diff --git a/server/src/db.ts b/server/src/db.ts
index 9ba02f0..d3715f5 100644
--- a/server/src/db.ts
+++ b/server/src/db.ts
@@ -16,6 +16,7 @@ archiveV1IfPresent();
 migrateAddCheckoutDate();
 migrateAddContainerWeight();
 migrateAddPrevBinId();
+migrateAddBinCheckFields();
 
 const schema = readFileSync(join(__dirname, "schema.sql"), "utf8");
 db.exec(schema);
@@ -44,6 +45,15 @@ function migrateAddPrevBinId(): void {
   db.exec(`ALTER TABLE inventory_items ADD COLUMN prev_bin_id TEXT REFERENCES bins(id)`);
 }
 
+function migrateAddBinCheckFields(): void {
+  const cols = db
+    .prepare(`PRAGMA table_info(bins)`)
+    .all() as { name: string }[];
+  if (cols.length === 0 || cols.some((c) => c.name === "cadence_days")) return;
+  db.exec(`ALTER TABLE bins ADD COLUMN cadence_days INTEGER NOT NULL DEFAULT 30`);
+  db.exec(`ALTER TABLE bins ADD COLUMN last_checked TEXT`);
+}
+
 // One-shot migration: the original schema put per-instance fields (weight,
 // bin_id, etc.) directly on `products`. The split schema separates products
 // (catalog) from inventory_items (instance). When we detect the old shape,
diff --git a/server/src/routes/bootstrap.ts b/server/src/routes/bootstrap.ts
index 62fa53e..28e6169 100644
--- a/server/src/routes/bootstrap.ts
+++ b/server/src/routes/bootstrap.ts
@@ -70,7 +70,14 @@ bootstrapRouter.get("/bootstrap", (_req, res) => {
     .all();
   const shops = db.prepare("SELECT * FROM shops ORDER BY id").all();
   const brands = db.prepare("SELECT * FROM brands ORDER BY id").all();
-  const bins = db.prepare("SELECT id, name, capacity FROM bins ORDER BY id").all();
+  const binsRaw = db.prepare("SELECT id, name, capacity, cadence_days, last_checked FROM bins ORDER BY id").all() as { id: string; name: string; capacity: number; cadence_days: number; last_checked: string | null }[];
+  const bins = binsRaw.map((b) => ({
+    id: b.id,
+    name: b.name,
+    capacity: b.capacity,
+    cadenceDays: b.cadence_days,
+    lastChecked: b.last_checked,
+  }));
   const strains = db
     .prepare<[], StrainRow>("SELECT * FROM strains ORDER BY name COLLATE NOCASE")
     .all();
diff --git a/server/src/routes/catalog.ts b/server/src/routes/catalog.ts
index 2e1eab7..f2f6705 100644
--- a/server/src/routes/catalog.ts
+++ b/server/src/routes/catalog.ts
@@ -103,20 +103,21 @@ catalogRouter.delete("/shops/:id", (req, res) => {
 });
 
 catalogRouter.post("/bins", (req, res) => {
-  const { name, capacity } = req.body as { name: string; capacity?: number };
+  const { name, capacity, cadenceDays } = req.body as { name: string; capacity?: number; cadenceDays?: number };
   if (!name?.trim()) return res.status(400).json({ error: "name required" });
   const id = nextId("bin", "bins");
   const cap = Number.isFinite(capacity) && (capacity as number) > 0 ? Math.floor(capacity as number) : 10;
-  db.prepare("INSERT INTO bins (id, name, capacity) VALUES (?, ?, ?)").run(id, name.trim(), cap);
-  res.json({ id, name: name.trim(), capacity: cap });
+  const cad = Number.isFinite(cadenceDays) && (cadenceDays as number) > 0 ? Math.floor(cadenceDays as number) : 30;
+  db.prepare("INSERT INTO bins (id, name, capacity, cadence_days) VALUES (?, ?, ?, ?)").run(id, name.trim(), cap, cad);
+  res.json({ id, name: name.trim(), capacity: cap, cadenceDays: cad, lastChecked: null });
 });
 
 catalogRouter.patch("/bins/:id", (req, res) => {
   const { id } = req.params;
-  const { name, capacity } = req.body as { name?: string; capacity?: number };
+  const { name, capacity, cadenceDays } = req.body as { name?: string; capacity?: number; cadenceDays?: number };
   const existing = db
-    .prepare<[string], { id: string; name: string; capacity: number }>(
-      "SELECT id, name, capacity FROM bins WHERE id = ?",
+    .prepare<[string], { id: string; name: string; capacity: number; cadence_days: number; last_checked: string | null }>(
+      "SELECT id, name, capacity, cadence_days, last_checked FROM bins WHERE id = ?",
     )
     .get(id);
   if (!existing) return res.status(404).json({ error: "bin not found" });
@@ -126,9 +127,13 @@ catalogRouter.patch("/bins/:id", (req, res) => {
     Number.isFinite(capacity) && (capacity as number) > 0
       ? Math.floor(capacity as number)
       : existing.capacity;
+  const nextCadence =
+    Number.isFinite(cadenceDays) && (cadenceDays as number) > 0
+      ? Math.floor(cadenceDays as number)
+      : existing.cadence_days;
 
-  db.prepare("UPDATE bins SET name = ?, capacity = ? WHERE id = ?").run(nextName, nextCapacity, id);
-  res.json({ id, name: nextName, capacity: nextCapacity });
+  db.prepare("UPDATE bins SET name = ?, capacity = ?, cadence_days = ? WHERE id = ?").run(nextName, nextCapacity, nextCadence, id);
+  res.json({ id, name: nextName, capacity: nextCapacity, cadenceDays: nextCadence, lastChecked: existing.last_checked });
 });
 
 // Deleting a bin unassigns any inventory items that reference it (bin_id → NULL),
diff --git a/server/src/routes/inventory.ts b/server/src/routes/inventory.ts
index 0751cc1..c533c7c 100644
--- a/server/src/routes/inventory.ts
+++ b/server/src/routes/inventory.ts
@@ -435,6 +435,62 @@ inventoryRouter.post("/inventory/:id/audit", (req, res) => {
   res.json({ ok: true });
 });
 
+// ─── Bin check endpoint ──────────────────────────────────────────
+
+inventoryRouter.post("/bins/:id/check", (req, res) => {
+  const { id } = req.params;
+  const { date, verifiedItemIds, goneItemIds } = req.body as {
+    date: string;
+    verifiedItemIds: string[];
+    goneItemIds: string[];
+  };
+
+  const bin = db
+    .prepare<[string], { id: string }>("SELECT id FROM bins WHERE id = ?")
+    .get(id);
+  if (!bin) return res.status(404).json({ error: "bin not found" });
+
+  const tx = db.transaction(() => {
+    for (const itemId of verifiedItemIds) {
+      const item = db
+        .prepare<
+          [string],
+          { product_id: string; count_original: number; count_last_audit: number | null }
+        >(
+          `SELECT product_id, count_original, count_last_audit FROM inventory_items WHERE id = ?`,
+        )
+        .get(itemId);
+      if (!item) continue;
+
+      const prev = item.count_last_audit ?? item.count_original;
+      db.prepare(
+        `INSERT INTO audits (inventory_id, date, mode, value, prev_value, confirmed_by)
+         VALUES (?, ?, 'presence', ?, ?, 'bin-check')`,
+      ).run(itemId, date, prev, prev);
+      db.prepare(
+        `UPDATE inventory_items SET count_last_audit = ? WHERE id = ?`,
+      ).run(prev, itemId);
+    }
+
+    for (const itemId of goneItemIds) {
+      try {
+        doGone(itemId, date, "missing from bin check");
+      } catch {
+        // item may already be gone
+      }
+    }
+
+    db.prepare("UPDATE bins SET last_checked = ? WHERE id = ?").run(date, id);
+  });
+
+  try {
+    tx();
+    res.json({ ok: true, verified: verifiedItemIds.length, gone: goneItemIds.length });
+  } catch (e: any) {
+    res.status(400).json({ error: e.message });
+  }
+});
+
 // ─── Batch endpoint ───────────────────────────────────────────────
 
 type BatchOp =
diff --git a/server/src/schema.sql b/server/src/schema.sql
index 8518e74..b3a1a4b 100644
--- a/server/src/schema.sql
+++ b/server/src/schema.sql
@@ -15,7 +15,9 @@ CREATE TABLE IF NOT EXISTS bins (
   id TEXT PRIMARY KEY,
   name TEXT NOT NULL,
   location TEXT,
-  capacity INTEGER NOT NULL DEFAULT 10
+  capacity INTEGER NOT NULL DEFAULT 10,
+  cadence_days INTEGER NOT NULL DEFAULT 30,
+  last_checked TEXT
 );
 
 -- Strains: one row per cannabis strain (catalog-level). UNIQUE on name only,
diff --git a/web/src/App.tsx b/web/src/App.tsx
index cff214c..b0f8ab0 100644
--- a/web/src/App.tsx
+++ b/web/src/App.tsx
@@ -37,7 +37,8 @@ import { AddInventoryFlow } from "./components/modals/AddInventoryFlow.js";
 import { EditInventoryFlow } from "./components/modals/EditInventoryFlow.js";
 import { ConsumeFlow } from "./components/modals/ConsumeFlow.js";
 import { MarkGoneFlow } from "./components/modals/MarkGoneFlow.js";
-import { AuditFlow } from "./components/modals/AuditFlow.js";
+import { WeighInFlow } from "./components/modals/WeighInFlow.js";
+import { BinCheckFlow } from "./components/modals/BinCheckFlow.js";
 import { CheckoutFlow } from "./components/modals/CheckoutFlow.js";
 import { CheckinFlow } from "./components/modals/CheckinFlow.js";
 import { CustodyView } from "./views/CustodyView.js";
@@ -61,7 +62,8 @@ type ModalKey =
   | "edit"
   | "consume"
   | "gone"
-  | "audit"
+  | "weighIn"
+  | "binCheck"
   | "checkout"
   | "checkin"
   | "addBrand"
@@ -170,17 +172,22 @@ export function App() {
     setSelected(null);
     setModal("gone");
   };
-  const [auditQueue, setAuditQueue] = useState<Item[]>([]);
-  const openAudit = (i?: Item) => {
+  const [weighInQueue, setWeighInQueue] = useState<Item[]>([]);
+  const openWeighIn = (i?: Item) => {
     setModalItem(i ?? null);
-    setAuditQueue([]);
-    setModal("audit");
+    setWeighInQueue([]);
+    setModal("weighIn");
   };
-  const openAuditQueue = (queue: Item[]) => {
+  const openWeighInQueue = (queue: Item[]) => {
     if (queue.length === 0) return;
     setModalItem(queue[0]!);
-    setAuditQueue(queue);
-    setModal("audit");
+    setWeighInQueue(queue);
+    setModal("weighIn");
+  };
+  const [binCheckBin, setBinCheckBin] = useState<Bin | null>(null);
+  const openBinCheck = (bin?: Bin) => {
+    setBinCheckBin(bin ?? null);
+    setModal("binCheck");
   };
   const openCheckout = (i?: Item) => {
     setModalItem(i ?? null);
@@ -273,7 +280,8 @@ export function App() {
         <Sidebar
           onAddProduct={openAdd}
           onMarkFinished={() => openConsume()}
-          onAudit={() => openAudit()}
+          onWeighIn={() => openWeighIn()}
+          onBinCheck={() => openBinCheck()}
           onCheckout={() => openCheckout()}
         />
       )}
@@ -294,14 +302,14 @@ export function App() {
         )}
         <Routes>
           <Route path="/" element={
-            <Dashboard data={data} stats={stats} onAuditItem={openAudit} onAuditQueue={openAuditQueue} onSelectItem={setSelected} />
+            <Dashboard data={data} stats={stats} onWeighInItem={openWeighIn} onWeighInQueue={openWeighInQueue} onBinCheck={openBinCheck} onSelectItem={setSelected} />
           } />
           <Route path="/inventory" element={
             <Inventory
               data={data}
               onSelectItem={setSelected}
               onAddInventory={openAdd}
-              onAuditNew={() => openAudit()}
+              onWeighInNew={() => openWeighIn()}
               onBulkEdit={openBulkEdit}
               onBulkConsume={openBulkConsume}
               onBulkCheckout={openBulkCheckout}
@@ -320,7 +328,7 @@ export function App() {
             <CustodyView data={data} onSelectItem={setSelected} onCheckin={openCheckin} onConsume={openConsume} onMarkGone={openMarkGone} />
           } />
           <Route path="/bins" element={
-            <BinsView data={data} onSelectItem={setSelected} onAddBin={() => setModal("addBin")} onEditBin={(bin) => { setModalBin(bin); setModal("editBin"); }} />
+            <BinsView data={data} onSelectItem={setSelected} onAddBin={() => setModal("addBin")} onEditBin={(bin) => { setModalBin(bin); setModal("editBin"); }} onBinCheck={openBinCheck} />
           } />
           <Route path="/shops" element={
             <ShopsView data={data} onSelectShop={setSelectedShop} onAddShop={() => setModal("addShop")} />
@@ -342,7 +350,7 @@ export function App() {
           onClose={() => { setSelected(null); setDrawerBack(null); }}
           onConsume={openConsume}
           onMarkGone={openMarkGone}
-          onAudit={openAudit}
+          onWeighIn={openWeighIn}
           onEdit={openEdit}
           onCheckout={openCheckout}
           onCheckin={openCheckin}
@@ -462,8 +470,11 @@ export function App() {
       {modal === "gone" && (
         <MarkGoneFlow data={data} onClose={() => setModal(null)} item={modalItem} />
       )}
-      {modal === "audit" && (
-        <AuditFlow data={data} onClose={() => setModal(null)} item={modalItem} queue={auditQueue.length > 0 ? auditQueue : undefined} />
+      {modal === "weighIn" && (
+        <WeighInFlow data={data} onClose={() => setModal(null)} item={modalItem} queue={weighInQueue.length > 0 ? weighInQueue : undefined} />
+      )}
+      {modal === "binCheck" && (
+        <BinCheckFlow data={data} onClose={() => setModal(null)} bin={binCheckBin} />
       )}
       {modal === "checkout" && (
         <CheckoutFlow data={data} onClose={() => setModal(null)} item={modalItem} />
@@ -510,7 +521,8 @@ export function App() {
           onScan={() => setScannerOpen(true)}
           onAddProduct={openAdd}
           onMarkFinished={() => openConsume()}
-          onAudit={() => openAudit()}
+          onWeighIn={() => openWeighIn()}
+          onBinCheck={() => openBinCheck()}
           onCheckout={() => openCheckout()}
         />
       )}
@@ -529,7 +541,7 @@ export function App() {
           noMatchText={scanNoMatch}
           onClose={() => { setScanResult(null); setScanNoMatch(null); }}
           onViewItem={(i) => setSelected(i)}
-          onAudit={(i) => openAudit(i)}
+          onWeighIn={(i) => openWeighIn(i)}
           onCheckout={(i) => openCheckout(i)}
           onCheckin={(i) => openCheckin(i)}
           onConsume={(i) => openConsume(i)}
diff --git a/web/src/api.ts b/web/src/api.ts
index 4d14063..d6e973b 100644
--- a/web/src/api.ts
+++ b/web/src/api.ts
@@ -202,18 +202,27 @@ export const api = {
   deleteShop: (id: string) =>
     request<{ ok: true }>(`/shops/${id}`, { method: "DELETE" }),
 
-  createBin: (body: { name: string; capacity?: number }) =>
-    request<{ id: string; name: string; capacity: number }>("/bins", {
+  createBin: (body: { name: string; capacity?: number; cadenceDays?: number }) =>
+    request<{ id: string; name: string; capacity: number; cadenceDays: number; lastChecked: string | null }>("/bins", {
       method: "POST",
       body: JSON.stringify(body),
     }),
 
-  updateBin: (id: string, body: { name?: string; capacity?: number }) =>
-    request<{ id: string; name: string; capacity: number }>(`/bins/${id}`, {
+  updateBin: (id: string, body: { name?: string; capacity?: number; cadenceDays?: number }) =>
+    request<{ id: string; name: string; capacity: number; cadenceDays: number; lastChecked: string | null }>(`/bins/${id}`, {
       method: "PATCH",
       body: JSON.stringify(body),
     }),
 
   deleteBin: (id: string) =>
     request<{ ok: true }>(`/bins/${id}`, { method: "DELETE" }),
+
+  completeBinCheck: (
+    binId: string,
+    body: { date: string; verifiedItemIds: string[]; goneItemIds: string[] },
+  ) =>
+    request<{ ok: true; verified: number; gone: number }>(`/bins/${binId}/check`, {
+      method: "POST",
+      body: JSON.stringify(body),
+    }),
 };
diff --git a/web/src/components/MobileBottomNav.tsx b/web/src/components/MobileBottomNav.tsx
index 29cd2ca..49dadf0 100644
--- a/web/src/components/MobileBottomNav.tsx
+++ b/web/src/components/MobileBottomNav.tsx
@@ -18,13 +18,15 @@ export function MobileBottomNav({
   onScan,
   onAddProduct,
   onMarkFinished,
-  onAudit,
+  onWeighIn,
+  onBinCheck,
   onCheckout,
 }: {
   onScan: () => void;
   onAddProduct: () => void;
   onMarkFinished: () => void;
-  onAudit: () => void;
+  onWeighIn: () => void;
+  onBinCheck: () => void;
   onCheckout: () => void;
 }) {
   const [moreOpen, setMoreOpen] = useState(false);
@@ -129,7 +131,8 @@ export function MobileBottomNav({
           </div>
           {[
             { icon: "plus", label: "Add inventory", action: onAddProduct },
-            { icon: "search", label: "Audit", action: onAudit },
+            { icon: "search", label: "Weigh In", action: onWeighIn },
+            { icon: "bin", label: "Bin Check", action: onBinCheck },
             { icon: "pocket", label: "Check out", action: onCheckout },
             { icon: "check", label: "Mark consumed", action: onMarkFinished },
           ].map((a) => (
diff --git a/web/src/components/ProductDetail.tsx b/web/src/components/ProductDetail.tsx
index dfaa5db..b194910 100644
--- a/web/src/components/ProductDetail.tsx
+++ b/web/src/components/ProductDetail.tsx
@@ -18,7 +18,7 @@ export function ProductDetail({
   onClose,
   onConsume,
   onMarkGone,
-  onAudit,
+  onWeighIn,
   onEdit,
   onCheckout,
   onCheckin,
@@ -30,7 +30,7 @@ export function ProductDetail({
   onClose: () => void;
   onConsume: (i: Item) => void;
   onMarkGone: (i: Item) => void;
-  onAudit: (i: Item) => void;
+  onWeighIn: (i: Item) => void;
   onEdit: (i: Item) => void;
   onCheckout: (i: Item) => void;
   onCheckin: (i: Item) => void;
@@ -182,9 +182,9 @@ export function ProductDetail({
             </div>
           ) : (
             <div style={{ display: "flex", gap: 6, alignItems: "center" }}>
-              {isActive && (
-                <Btn variant={overdue ? "sage" : "ghost"} icon="search" onClick={() => onAudit(item)}>
-                  Audit
+              {isActive && item.kind === "bulk" && (
+                <Btn variant={overdue ? "sage" : "ghost"} icon="search" onClick={() => onWeighIn(item)}>
+                  Weigh In
                 </Btn>
               )}
               {isActive && (
@@ -231,7 +231,7 @@ export function ProductDetail({
             {isCheckedOut && (
               <Pill tone="outline">Checked out · {fmt.daysAgo(item.checkoutDate, getStoredTimezone())}</Pill>
             )}
-            {isActive && overdue && <Pill tone="amber">Audit overdue · {sinceCheck}d</Pill>}
+            {isActive && overdue && <Pill tone="amber">Weigh-in overdue · {sinceCheck}d</Pill>}
           </div>
           <h1
             className="serif"
@@ -365,10 +365,12 @@ export function ProductDetail({
                 marginBottom: 12,
               }}
             >
-              <div className="smallcaps" style={{ color: "var(--ink-3)" }}>Audit history</div>
-              {isActive && (
+              <div className="smallcaps" style={{ color: "var(--ink-3)" }}>
+                {item.kind === "bulk" ? "Weigh-in history" : "Check history"}
+              </div>
+              {isActive && item.kind === "bulk" && (
                 <button
-                  onClick={() => onAudit(item)}
+                  onClick={() => onWeighIn(item)}
                   style={{
                     background: "none",
                     border: "none",
@@ -378,7 +380,7 @@ export function ProductDetail({
                     textDecoration: "underline",
                   }}
                 >
-                  + New audit
+                  + New weigh-in
                 </button>
               )}
             </div>
@@ -513,8 +515,8 @@ export function ProductDetail({
         {isMobile && (
           <BottomSheet open={actionsOpen} onClose={() => setActionsOpen(false)}>
             <div style={{ padding: "8px 16px 20px" }}>
-              {isActive && (
-                <MobileAction icon="search" label="Audit" onClick={() => { setActionsOpen(false); onAudit(item); }} />
+              {isActive && item.kind === "bulk" && (
+                <MobileAction icon="search" label="Weigh In" onClick={() => { setActionsOpen(false); onWeighIn(item); }} />
               )}
               {isActive && (
                 <MobileAction icon="pocket" label="Check out" onClick={() => { setActionsOpen(false); onCheckout(item); }} />
diff --git a/web/src/components/ScanAction.tsx b/web/src/components/ScanAction.tsx
index 5575312..3a47d84 100644
--- a/web/src/components/ScanAction.tsx
+++ b/web/src/components/ScanAction.tsx
@@ -12,7 +12,7 @@ export function ScanAction({
   noMatchText,
   onClose,
   onViewItem,
-  onAudit,
+  onWeighIn,
   onCheckout,
   onCheckin,
   onConsume,
@@ -26,7 +26,7 @@ export function ScanAction({
   noMatchText: string | null;
   onClose: () => void;
   onViewItem: (item: Item) => void;
-  onAudit: (item: Item) => void;
+  onWeighIn: (item: Item) => void;
   onCheckout: (item: Item) => void;
   onCheckin: (item: Item) => void;
   onConsume: (item: Item) => void;
@@ -89,14 +89,16 @@ export function ScanAction({
                 <span className="mono">{item.assetId}</span>
                 <span style={{ color: "var(--ink-4)" }}>·</span>
                 <span className="mono">{remainingShort(item)}</span>
-                {overdue && <Pill tone="amber" style={{ fontSize: 10 }}>Audit due</Pill>}
+                {overdue && <Pill tone="amber" style={{ fontSize: 10 }}>Weigh-in due</Pill>}
               </div>
             </div>
           </div>
 
           {/* Actions */}
           <ActionButton icon="arrow" label="View details" onClick={() => { onClose(); onViewItem(item); }} />
-          <ActionButton icon="search" label="Audit" onClick={() => { onClose(); onAudit(item); }} />
+          {item.kind === "bulk" && (
+            <ActionButton icon="search" label="Weigh In" onClick={() => { onClose(); onWeighIn(item); }} />
+          )}
           {item.status === "active" && (
             <ActionButton icon="pocket" label="Check out" onClick={() => { onClose(); onCheckout(item); }} />
           )}
diff --git a/web/src/components/Sidebar.tsx b/web/src/components/Sidebar.tsx
index 4b9bbbb..83cdb29 100644
--- a/web/src/components/Sidebar.tsx
+++ b/web/src/components/Sidebar.tsx
@@ -45,12 +45,14 @@ const TAGLINE = TAGLINES[Math.floor(Math.random() * TAGLINES.length)]!;
 export function Sidebar({
   onAddProduct,
   onMarkFinished,
-  onAudit,
+  onWeighIn,
+  onBinCheck,
   onCheckout,
 }: {
   onAddProduct: () => void;
   onMarkFinished: () => void;
-  onAudit: () => void;
+  onWeighIn: () => void;
+  onBinCheck: () => void;
   onCheckout: () => void;
 }) {
   return (
@@ -91,8 +93,11 @@ export function Sidebar({
       <button className="nav-link nav-action" onClick={onAddProduct} title="Add inventory">
         <Icon name="plus" size={16} /> <span className="nav-label">Add inventory</span>
       </button>
-      <button className="nav-link nav-action" onClick={onAudit} title="Audit">
-        <Icon name="search" size={16} /> <span className="nav-label">Audit</span>
+      <button className="nav-link nav-action" onClick={onWeighIn} title="Weigh in">
+        <Icon name="search" size={16} /> <span className="nav-label">Weigh In</span>
+      </button>
+      <button className="nav-link nav-action" onClick={onBinCheck} title="Bin check">
+        <Icon name="bin" size={16} /> <span className="nav-label">Bin Check</span>
       </button>
       <button className="nav-link nav-action" onClick={onCheckout} title="Check out">
         <Icon name="pocket" size={16} /> <span className="nav-label">Check out</span>
diff --git a/web/src/components/modals/BinCheckFlow.tsx b/web/src/components/modals/BinCheckFlow.tsx
new file mode 100644
index 0000000..7e81611
--- /dev/null
+++ b/web/src/components/modals/BinCheckFlow.tsx
@@ -0,0 +1,442 @@
+import { useState } from "react";
+import { useMutation, useQueryClient } from "@tanstack/react-query";
+import type { Bin, Bootstrap, Item } from "../../types.js";
+import { helpers, enrichItems } from "../../types.js";
+import { getToday, getStoredTimezone } from "../../tz.js";
+import { api } from "../../api.js";
+import { Btn, Icon } from "../primitives/index.js";
+import { ScanField, type ScanResult } from "../ScanField.js";
+import { ModalBackdrop, ModalHeader, ModalFooter } from "./ModalChrome.js";
+import { useToast } from "../Toast.js";
+
+type Phase = "select" | "scan" | "review";
+
+export function BinCheckFlow({
+  data,
+  onClose,
+  bin: initialBin,
+}: {
+  data: Bootstrap;
+  onClose: () => void;
+  bin: Bin | null;
+}) {
+  const qc = useQueryClient();
+  const { toast } = useToast();
+  const allItems = enrichItems(data);
+  const todayStr = getToday(getStoredTimezone());
+
+  const [phase, setPhase] = useState<Phase>(initialBin ? "scan" : "select");
+  const [selectedBin, setSelectedBin] = useState<Bin | null>(initialBin);
+  const [verified, setVerified] = useState<Set<string>>(new Set());
+  const [gone, setGone] = useState<Set<string>>(new Set());
+  const [scanMessage, setScanMessage] = useState<{ text: string; color: string } | null>(null);
+
+  const expectedItems = selectedBin
+    ? allItems.filter((i) => i.binId === selectedBin.id && i.status === "active")
+    : [];
+
+  const missingItems = expectedItems.filter(
+    (i) => !verified.has(i.id) && !gone.has(i.id),
+  );
+
+  const sortedBins = [...data.bins].sort((a, b) => {
+    const aOver = helpers.binCheckOverdue(a, todayStr) ? 0 : 1;
+    const bOver = helpers.binCheckOverdue(b, todayStr) ? 0 : 1;
+    if (aOver !== bOver) return aOver - bOver;
+    return helpers.daysSinceBinCheck(b, todayStr) - helpers.daysSinceBinCheck(a, todayStr);
+  });
+
+  const handleSelectBin = (bin: Bin) => {
+    setSelectedBin(bin);
+    setVerified(new Set());
+    setGone(new Set());
+    setScanMessage(null);
+    setPhase("scan");
+  };
+
+  const handleScan = (result: ScanResult) => {
+    if (result.kind !== "item") return;
+    const item = result.item;
+
+    if (verified.has(item.id)) {
+      setScanMessage({ text: `Already scanned — ${item.name}`, color: "var(--ink-3)" });
+      return;
+    }
+
+    if (item.binId === selectedBin?.id && item.status === "active") {
+      setVerified((prev) => new Set(prev).add(item.id));
+      setScanMessage({ text: `Verified — ${item.name}`, color: "var(--sage)" });
+    } else if (item.binId && item.binId !== selectedBin?.id) {
+      const correctBin = data.bins.find((b) => b.id === item.binId);
+      setScanMessage({
+        text: `Wrong bin — move ${item.name} to ${correctBin?.name ?? item.binId}`,
+        color: "var(--amber)",
+      });
+    } else {
+      setScanMessage({
+        text: `${item.name} is not assigned to this bin`,
+        color: "var(--amber)",
+      });
+    }
+  };
+
+  const handleScanNoMatch = (raw: string) => {
+    setScanMessage({
+      text: `"${raw}" not in system — ingest this item first`,
+      color: "var(--terracotta)",
+    });
+  };
+
+  const handleMarkGone = (itemId: string) => {
+    setGone((prev) => new Set(prev).add(itemId));
+  };
+
+  const complete = useMutation({
+    mutationFn: () =>
+      api.completeBinCheck(selectedBin!.id, {
+        date: todayStr,
+        verifiedItemIds: [...verified],
+        goneItemIds: [...gone],
+      }),
+    onSuccess: (result) => {
+      qc.invalidateQueries({ queryKey: ["bootstrap"] });
+      const parts: string[] = [];
+      if (result.verified > 0) parts.push(`${result.verified} verified`);
+      if (result.gone > 0) parts.push(`${result.gone} marked gone`);
+      toast(`Bin check complete — ${parts.join(", ")}`);
+      onClose();
+    },
+  });
+
+  const binItemCount = (bin: Bin) =>
+    allItems.filter((i) => i.binId === bin.id && i.status === "active").length;
+
+  return (
+    <ModalBackdrop onClose={onClose}>
+      <div
+        style={{
+          width: "min(720px, 96vw)",
+          margin: "40px 20px",
+          background: "var(--bg)",
+          border: "1px solid var(--line)",
+          borderRadius: "var(--r-lg)",
+          boxShadow: "var(--shadow-lg)",
+        }}
+      >
+        {/* ── Phase: Select bin ─────────────────────────── */}
+        {phase === "select" && (
+          <>
+            <ModalHeader title="Bin Check" eyebrow="Select a bin to check" onClose={onClose} />
+            <div style={{ padding: 32, maxHeight: "60vh", overflowY: "auto" }}>
+              {sortedBins.length === 0 ? (
+                <div style={{ textAlign: "center", color: "var(--ink-3)", padding: "24px 0", fontStyle: "italic" }}>
+                  No bins created yet.
+                </div>
+              ) : (
+                <div style={{ display: "flex", flexDirection: "column", gap: 8 }}>
+                  {sortedBins.map((bin) => {
+                    const overdue = helpers.binCheckOverdue(bin, todayStr);
+                    const days = helpers.daysSinceBinCheck(bin, todayStr);
+                    const count = binItemCount(bin);
+                    return (
+                      <button
+                        key={bin.id}
+                        onClick={() => handleSelectBin(bin)}
+                        style={{
+                          display: "flex",
+                          alignItems: "center",
+                          justifyContent: "space-between",
+                          padding: "14px 18px",
+                          background: overdue ? "var(--amber-soft)" : "var(--bg-2)",
+                          border: `1px solid ${overdue ? "var(--amber)" : "var(--line)"}`,
+                          borderRadius: "var(--r-md)",
+                          cursor: "pointer",
+                          textAlign: "left",
+                          width: "100%",
+                          transition: "background 120ms",
+                        }}
+                      >
+                        <div>
+                          <div className="serif" style={{ fontSize: 18, fontWeight: 500 }}>
+                            {bin.name}
+                          </div>
+                          <div style={{ fontSize: 12, color: "var(--ink-3)", marginTop: 2 }}>
+                            {count} item{count !== 1 ? "s" : ""} · cadence {bin.cadenceDays}d
+                          </div>
+                        </div>
+                        <div style={{ textAlign: "right" }}>
+                          <div style={{ fontSize: 13, color: overdue ? "var(--terracotta)" : "var(--ink-2)" }}>
+                            {days === Infinity ? "Never checked" : `${days}d ago`}
+                          </div>
+                          {overdue && (
+                            <div style={{ fontSize: 11, color: "var(--terracotta)", fontWeight: 600, marginTop: 2 }}>
+                              OVERDUE
+                            </div>
+                          )}
+                        </div>
+                      </button>
+                    );
+                  })}
+                </div>
+              )}
+            </div>
+            <ModalFooter>
+              <div />
+              <Btn variant="ghost" onClick={onClose}>Cancel</Btn>
+            </ModalFooter>
+          </>
+        )}
+
+        {/* ── Phase: Scan items ─────────────────────────── */}
+        {phase === "scan" && selectedBin && (
+          <>
+            <ModalHeader
+              title={selectedBin.name}
+              eyebrow={`${verified.size} of ${expectedItems.length} verified`}
+              onClose={onClose}
+            />
+
+            {expectedItems.length > 0 && (
+              <div style={{ height: 3, background: "var(--bg-3)" }}>
+                <div
+                  style={{
+                    height: "100%",
+                    width: `${(verified.size / expectedItems.length) * 100}%`,
+                    background: "var(--sage)",
+                    borderRadius: "0 2px 2px 0",
+                    transition: "width 300ms ease",
+                  }}
+                />
+              </div>
+            )}
+
+            <div style={{ padding: 32 }}>
+              <ScanField
+                items={allItems}
+                products={[]}
+                matchedLabel={null}
+                onMatch={handleScan}
+                onScanNoMatch={handleScanNoMatch}
+                mode="assetId"
+              />
+
+              {scanMessage && (
+                <div
+                  style={{
+                    marginTop: 12,
+                    padding: "10px 14px",
+                    borderRadius: "var(--r-md)",
+                    background: "var(--bg-2)",
+                    border: "1px solid var(--line)",
+                    fontSize: 13,
+                    color: scanMessage.color,
+                    fontWeight: 500,
+                  }}
+                >
+                  {scanMessage.text}
+                </div>
+              )}
+
+              <div style={{ marginTop: 20, maxHeight: 320, overflowY: "auto" }}>
+                {expectedItems.length === 0 ? (
+                  <div style={{ textAlign: "center", color: "var(--ink-3)", padding: "24px 0", fontStyle: "italic" }}>
+                    This bin has no active items.
+                  </div>
+                ) : (
+                  expectedItems.map((item) => {
+                    const isVerified = verified.has(item.id);
+                    return (
+                      <div
+                        key={item.id}
+                        style={{
+                          display: "flex",
+                          alignItems: "center",
+                          gap: 10,
+                          padding: "8px 0",
+                          borderBottom: "1px solid var(--line)",
+                        }}
+                      >
+                        <div
+                          style={{
+                            width: 22,
+                            height: 22,
+                            borderRadius: "50%",
+                            border: `2px solid ${isVerified ? "var(--sage)" : "var(--line)"}`,
+                            background: isVerified ? "var(--sage)" : "transparent",
+                            display: "flex",
+                            alignItems: "center",
+                            justifyContent: "center",
+                            flexShrink: 0,
+                          }}
+                        >
+                          {isVerified && <Icon name="check" size={14} color="white" />}
+                        </div>
+                        <div style={{ flex: 1, minWidth: 0 }}>
+                          <div style={{ fontSize: 14, fontWeight: 500, color: isVerified ? "var(--sage)" : "var(--ink)" }}>
+                            {item.name}
+                          </div>
+                          <div style={{ fontSize: 11, color: "var(--ink-3)" }}>
+                            <span className="mono">{item.assetId}</span> · {item.type}
+                          </div>
+                        </div>
+                      </div>
+                    );
+                  })
+                )}
+              </div>
+            </div>
+
+            <ModalFooter>
+              <Btn variant="ghost" onClick={() => { setPhase("select"); setSelectedBin(null); }}>
+                Back
+              </Btn>
+              <Btn
+                variant="primary"
+                onClick={() => setPhase("review")}
+              >
+                Done scanning
+              </Btn>
+            </ModalFooter>
+          </>
+        )}
+
+        {/* ── Phase: Review & complete ──────────────────── */}
+        {phase === "review" && selectedBin && (
+          <>
+            <ModalHeader
+              title="Review"
+              eyebrow={selectedBin.name}
+              onClose={onClose}
+            />
+
+            <div style={{ padding: 32 }}>
+              {/* Summary */}
+              <div
+                style={{
+                  display: "grid",
+                  gridTemplateColumns: "1fr 1fr 1fr",
+                  gap: 16,
+                  marginBottom: 24,
+                }}
+              >
+                <div style={{ padding: 14, background: "var(--bg-2)", borderRadius: "var(--r-md)", textAlign: "center" }}>
+                  <div className="smallcaps" style={{ color: "var(--ink-3)" }}>Verified</div>
+                  <div className="serif" style={{ fontSize: 24, color: "var(--sage)" }}>{verified.size}</div>
+                </div>
+                <div style={{ padding: 14, background: "var(--bg-2)", borderRadius: "var(--r-md)", textAlign: "center" }}>
+                  <div className="smallcaps" style={{ color: "var(--ink-3)" }}>Missing</div>
+                  <div className="serif" style={{ fontSize: 24, color: missingItems.length > 0 ? "var(--terracotta)" : "var(--ink)" }}>
+                    {missingItems.length}
+                  </div>
+                </div>
+                <div style={{ padding: 14, background: "var(--bg-2)", borderRadius: "var(--r-md)", textAlign: "center" }}>
+                  <div className="smallcaps" style={{ color: "var(--ink-3)" }}>Gone</div>
+                  <div className="serif" style={{ fontSize: 24, color: gone.size > 0 ? "var(--terracotta)" : "var(--ink)" }}>
+                    {gone.size}
+                  </div>
+                </div>
+              </div>
+
+              {/* Missing items list */}
+              {missingItems.length > 0 && (
+                <div style={{ marginBottom: 16 }}>
+                  <div className="smallcaps" style={{ color: "var(--terracotta)", marginBottom: 8 }}>
+                    Missing items
+                  </div>
+                  {missingItems.map((item) => (
+                    <div
+                      key={item.id}
+                      style={{
+                        display: "flex",
+                        alignItems: "center",
+                        justifyContent: "space-between",
+                        padding: "10px 0",
+                        borderBottom: "1px solid var(--line)",
+                      }}
+                    >
+                      <div>
+                        <div style={{ fontSize: 14, fontWeight: 500 }}>{item.name}</div>
+                        <div style={{ fontSize: 11, color: "var(--ink-3)" }}>
+                          <span className="mono">{item.assetId}</span> · {item.type}
+                        </div>
+                      </div>
+                      <div style={{ display: "flex", gap: 6 }}>
+                        <Btn variant="ghost" onClick={() => handleMarkGone(item.id)}>
+                          Mark gone
+                        </Btn>
+                      </div>
+                    </div>
+                  ))}
+                  <div style={{ marginTop: 12 }}>
+                    <Btn variant="ghost" onClick={() => setPhase("scan")}>
+                      Re-scan
+                    </Btn>
+                  </div>
+                </div>
+              )}
+
+              {/* Gone items */}
+              {gone.size > 0 && (
+                <div>
+                  <div className="smallcaps" style={{ color: "var(--ink-3)", marginBottom: 8 }}>
+                    Marked as gone
+                  </div>
+                  {[...gone].map((id) => {
+                    const item = allItems.find((i) => i.id === id);
+                    if (!item) return null;
+                    return (
+                      <div
+                        key={id}
+                        style={{
+                          display: "flex",
+                          alignItems: "center",
+                          justifyContent: "space-between",
+                          padding: "8px 0",
+                          borderBottom: "1px solid var(--line)",
+                          color: "var(--ink-3)",
+                        }}
+                      >
+                        <div>
+                          <div style={{ fontSize: 14, textDecoration: "line-through" }}>{item.name}</div>
+                          <div style={{ fontSize: 11 }}>
+                            <span className="mono">{item.assetId}</span>
+                          </div>
+                        </div>
+                        <Btn
+                          variant="ghost"
+                          onClick={() => setGone((prev) => { const next = new Set(prev); next.delete(id); return next; })}
+                        >
+                          Undo
+                        </Btn>
+                      </div>
+                    );
+                  })}
+                </div>
+              )}
+
+              {missingItems.length === 0 && gone.size === 0 && (
+                <div style={{ textAlign: "center", padding: "16px 0", color: "var(--sage)", fontSize: 15, fontWeight: 500 }}>
+                  All items verified — ready to complete.
+                </div>
+              )}
+            </div>
+
+            <ModalFooter>
+              <Btn variant="ghost" onClick={() => setPhase("scan")}>
+                Back
+              </Btn>
+              <Btn
+                variant="primary"
+                icon="check"
+                disabled={complete.isPending}
+                onClick={() => complete.mutate()}
+              >
+                {complete.isPending ? "Saving…" : "Complete bin check"}
+              </Btn>
+            </ModalFooter>
+          </>
+        )}
+      </div>
+    </ModalBackdrop>
+  );
+}
diff --git a/web/src/components/modals/CatalogModals.tsx b/web/src/components/modals/CatalogModals.tsx
index 2a06639..4f0a7d8 100644
--- a/web/src/components/modals/CatalogModals.tsx
+++ b/web/src/components/modals/CatalogModals.tsx
@@ -125,14 +125,15 @@ export function EditBinModal({
   bin,
   onClose,
 }: {
-  bin: { id: string; name: string; capacity: number };
+  bin: { id: string; name: string; capacity: number; cadenceDays: number };
   onClose: () => void;
 }) {
   const qc = useQueryClient();
   const [name, setName] = useState(bin.name);
   const [capacity, setCapacity] = useState(bin.capacity);
+  const [cadenceDays, setCadenceDays] = useState(bin.cadenceDays);
   const update = useMutation({
-    mutationFn: () => api.updateBin(bin.id, { name: name.trim(), capacity }),
+    mutationFn: () => api.updateBin(bin.id, { name: name.trim(), capacity, cadenceDays }),
     onSuccess: () => {
       qc.invalidateQueries({ queryKey: ["bootstrap"] });
       onClose();
@@ -152,7 +153,7 @@ export function EditBinModal({
         }}
       >
         <ModalHeader title="Edit bin" eyebrow="Storage" onClose={onClose} />
-        <div style={{ padding: 32, display: "grid", gridTemplateColumns: "2fr 1fr", gap: 16 }}>
+        <div style={{ padding: 32, display: "grid", gridTemplateColumns: "2fr 1fr 1fr", gap: 16 }}>
           <Field label="Bin name">
             <Input
               autoFocus
@@ -170,6 +171,15 @@ export function EditBinModal({
               onChange={(e) => setCapacity(Math.max(1, Math.floor(+e.target.value || 1)))}
             />
           </Field>
+          <Field label="Check cadence">
+            <Input
+              type="number"
+              min={1}
+              step={1}
+              value={cadenceDays}
+              onChange={(e) => setCadenceDays(Math.max(1, Math.floor(+e.target.value || 30)))}
+            />
+          </Field>
         </div>
         <ModalFooter>
           <div />
@@ -194,8 +204,9 @@ export function AddBinModal({ onClose }: { onClose: () => void }) {
   const qc = useQueryClient();
   const [name, setName] = useState("");
   const [capacity, setCapacity] = useState(10);
+  const [cadenceDays, setCadenceDays] = useState(30);
   const create = useMutation({
-    mutationFn: () => api.createBin({ name: name.trim(), capacity }),
+    mutationFn: () => api.createBin({ name: name.trim(), capacity, cadenceDays }),
     onSuccess: () => {
       qc.invalidateQueries({ queryKey: ["bootstrap"] });
       onClose();
@@ -215,7 +226,7 @@ export function AddBinModal({ onClose }: { onClose: () => void }) {
         }}
       >
         <ModalHeader title="Add a bin" eyebrow="Storage" onClose={onClose} />
-        <div style={{ padding: 32, display: "grid", gridTemplateColumns: "2fr 1fr", gap: 16 }}>
+        <div style={{ padding: 32, display: "grid", gridTemplateColumns: "2fr 1fr 1fr", gap: 16 }}>
           <Field label="Bin name">
             <Input
               autoFocus
@@ -233,6 +244,15 @@ export function AddBinModal({ onClose }: { onClose: () => void }) {
               onChange={(e) => setCapacity(Math.max(1, Math.floor(+e.target.value || 1)))}
             />
           </Field>
+          <Field label="Check cadence">
+            <Input
+              type="number"
+              min={1}
+              step={1}
+              value={cadenceDays}
+              onChange={(e) => setCadenceDays(Math.max(1, Math.floor(+e.target.value || 30)))}
+            />
+          </Field>
         </div>
         <ModalFooter>
           <div />
diff --git a/web/src/components/modals/AuditFlow.tsx b/web/src/components/modals/WeighInFlow.tsx
similarity index 80%
rename from web/src/components/modals/AuditFlow.tsx
rename to web/src/components/modals/WeighInFlow.tsx
index a8bbd38..9244a91 100644
--- a/web/src/components/modals/AuditFlow.tsx
+++ b/web/src/components/modals/WeighInFlow.tsx
@@ -4,12 +4,12 @@ import type { Bootstrap, Item } from "../../types.js";
 import { TYPES, helpers, enrichItems } from "../../types.js";
 import { getToday, getStoredTimezone } from "../../tz.js";
 import { api } from "../../api.js";
-import { Btn, Field, Input, Select } from "../primitives/index.js";
+import { Btn, Field, Input } from "../primitives/index.js";
 import { ScanField, type ScanResult } from "../ScanField.js";
 import { ModalBackdrop, ModalHeader, ModalFooter } from "./ModalChrome.js";
 import { useToast } from "../Toast.js";
 
-const AUDIT_MODE_LABELS: Record<string, { title: string; desc: string }> = {
+const MODE_LABELS: Record<string, { title: string; desc: string }> = {
   weigh: {
     title: "Reweigh on a scale",
     desc: "Place the jar (minus tare) and record the new weight.",
@@ -18,13 +18,9 @@ const AUDIT_MODE_LABELS: Record<string, { title: string; desc: string }> = {
     title: "Visual estimate",
     desc: "Eyeball the remaining amount — quick and approximate.",
   },
-  presence: {
-    title: "Confirm presence",
-    desc: "Verify the item is still where you left it. Count units if applicable.",
-  },
 };
 
-export function AuditFlow({
+export function WeighInFlow({
   data,
   onClose,
   item: initialItem,
@@ -38,28 +34,23 @@ export function AuditFlow({
   const qc = useQueryClient();
   const { toast } = useToast();
   const allItems = enrichItems(data);
-  const overdueFirst = [...allItems]
-    .filter((i) => i.status === "active")
+  const bulkItems = [...allItems]
+    .filter((i) => i.status === "active" && i.kind === "bulk")
     .sort((a, b) => helpers.daysSinceCheck(b) - helpers.daysSinceCheck(a));
 
   const [queueIdx, setQueueIdx] = useState(0);
   const [itemId, setItemId] = useState(initialItem?.id ?? "");
   const [date, setDate] = useState(getToday(getStoredTimezone()));
-  const [confirmedBy, setConfirmedBy] = useState<"asset" | "visual">("asset");
 
   const item = allItems.find((i) => i.id === itemId);
   const cfg = item ? TYPES.find((t) => t.id === item.type) : undefined;
 
   const initialValueFor = (i: Item | undefined): string => {
     if (!i) return "0";
-    if (i.kind === "discrete") {
-      return String(i.countLastAudit ?? i.countOriginal);
-    }
     const last = helpers.lastAudit(i);
     return (last ? last.value : i.weight).toFixed(2);
   };
   const [value, setValue] = useState<string>(initialValueFor(item));
-  const isConcentrate = item?.type === "Concentrate";
   const [inputMode, setInputMode] = useState<"direct" | "container">(
     item?.containerWeight != null ? "container" : "direct",
   );
@@ -86,17 +77,16 @@ export function AuditFlow({
   const effectiveMode =
     inputMode === "container" ? "weigh" : (cfg?.auditMode ?? "weigh");
 
-  const audit = useMutation({
+  const weighIn = useMutation({
     mutationFn: () =>
       api.auditInventoryItem(itemId, {
         date,
         mode: effectiveMode,
         value: effectiveValue,
-        confirmedBy: cfg?.auditMode === "presence" ? confirmedBy : undefined,
       }),
     onSuccess: () => {
       qc.invalidateQueries({ queryKey: ["bootstrap"] });
-      toast(`Audit saved — next due in ${cfg?.cadenceDays ?? "?"}d`);
+      toast(`Weigh-in saved — next due in ${cfg?.cadenceDays ?? "?"}d`);
       if (queue && queueIdx + 1 < queue.length) {
         const nextItem = queue[queueIdx + 1]!;
         setQueueIdx((i) => i + 1);
@@ -118,15 +108,13 @@ export function AuditFlow({
   const auditMode = cfg?.auditMode ?? "weigh";
   const ml = inputMode === "container"
     ? { title: "Weigh container", desc: "Place the sealed jar on a scale and enter the total weight. Product remaining is calculated from the tare." }
-    : AUDIT_MODE_LABELS[auditMode] ?? AUDIT_MODE_LABELS.weigh!;
+    : MODE_LABELS[auditMode] ?? MODE_LABELS.weigh!;
 
   const last = item ? helpers.lastAudit(item) : null;
   const prevValue = item
-    ? item.kind === "discrete"
-      ? item.countLastAudit ?? item.countOriginal
-      : last
-        ? last.value
-        : item.weight
+    ? last
+      ? last.value
+      : item.weight
     : 0;
 
   const delta = effectiveValue - prevValue;
@@ -144,8 +132,8 @@ export function AuditFlow({
         }}
       >
         <ModalHeader
-          title={item ? ml.title : "Audit"}
-          eyebrow={queue && queue.length > 1 ? `${queueIdx + 1} of ${queue.length} overdue` : ""}
+          title={item ? ml.title : "Weigh In"}
+          eyebrow={queue && queue.length > 1 ? `${queueIdx + 1} of ${queue.length} overdue weigh-ins` : ""}
           onClose={onClose}
         />
 
@@ -165,7 +153,7 @@ export function AuditFlow({
 
         <div style={{ padding: 32 }}>
           <ScanField
-            items={overdueFirst}
+            items={bulkItems}
             products={[]}
             matchedLabel={item ? `${item.assetId} · ${item.name}` : null}
             onMatch={handleScan}
@@ -208,7 +196,7 @@ export function AuditFlow({
                 </div>
               </div>
 
-              {tare != null && !isConcentrate && (
+              {tare != null && (
                 <div style={{ display: "flex", gap: 8, marginTop: 16 }}>
                   <Btn
                     variant={inputMode === "container" ? "primary" : "ghost"}
@@ -228,7 +216,7 @@ export function AuditFlow({
               <div
                 style={{
                   display: "grid",
-                  gridTemplateColumns: auditMode === "presence" ? "1fr 1fr 1fr" : "1fr 1fr",
+                  gridTemplateColumns: "1fr 1fr",
                   gap: 16,
                   marginTop: 24,
                 }}
@@ -245,16 +233,14 @@ export function AuditFlow({
                 ) : (
                   <Field
                     label={
-                      item.kind === "discrete"
-                        ? `Count now (${cfg?.unit})`
-                        : auditMode === "weigh"
-                          ? `Weight now (${cfg?.unit})`
-                          : `Estimate now (${cfg?.unit})`
+                      auditMode === "weigh"
+                        ? `Weight now (${cfg?.unit})`
+                        : `Estimate now (${cfg?.unit})`
                     }
                   >
                     <Input
                       type="number"
-                      step={item.kind === "discrete" ? "1" : "0.1"}
+                      step="0.1"
                       value={value}
                       onChange={(e) => setValue(e.target.value)}
                     />
@@ -263,17 +249,6 @@ export function AuditFlow({
                 <Field label="Date">
                   <Input type="date" value={date} onChange={(e) => setDate(e.target.value)} />
                 </Field>
-                {auditMode === "presence" && (
-                  <Field label="Confirmed by">
-                    <Select
-                      value={confirmedBy}
-                      onChange={(e) => setConfirmedBy(e.target.value as typeof confirmedBy)}
-                    >
-                      <option value="asset">Asset id</option>
-                      <option value="visual">Visual ID</option>
-                    </Select>
-                  </Field>
-                )}
               </div>
 
               {inputMode === "container" && tare != null && (
@@ -302,13 +277,13 @@ export function AuditFlow({
                 <div>
                   <div className="smallcaps" style={{ color: "var(--ink-3)" }}>Was</div>
                   <div className="serif" style={{ fontSize: 22 }}>
-                    {item.kind === "discrete" ? prevValue : prevValue.toFixed(2)} {cfg?.unit}
+                    {prevValue.toFixed(2)} {cfg?.unit}
                   </div>
                 </div>
                 <div>
                   <div className="smallcaps" style={{ color: "var(--ink-3)" }}>Now</div>
                   <div className="serif" style={{ fontSize: 22, color: "var(--sage)" }}>
-                    {effectiveValue.toFixed(item.kind === "discrete" ? 0 : 2)} {cfg?.unit}
+                    {effectiveValue.toFixed(2)} {cfg?.unit}
                   </div>
                 </div>
                 <div>
@@ -320,7 +295,7 @@ export function AuditFlow({
                       color: delta < 0 ? "var(--terracotta)" : "var(--ink)",
                     }}
                   >
-                    {delta.toFixed(item.kind === "discrete" ? 0 : 2)} {cfg?.unit}
+                    {delta.toFixed(2)} {cfg?.unit}
                   </div>
                 </div>
               </div>
@@ -334,23 +309,23 @@ export function AuditFlow({
 
         <ModalFooter>
           <div style={{ fontSize: 12, color: "var(--ink-3)" }}>
-            {item ? `Next audit due in ${cfg?.cadenceDays}d` : ""}
+            {item ? `Next weigh-in due in ${cfg?.cadenceDays}d` : ""}
           </div>
           <div style={{ display: "flex", gap: 8 }}>
             <Btn variant="ghost" onClick={onClose}>Cancel</Btn>
             <Btn
               variant="primary"
               icon="check"
-              disabled={audit.isPending || !item}
-              onClick={() => audit.mutate()}
+              disabled={weighIn.isPending || !item}
+              onClick={() => weighIn.mutate()}
             >
-              {audit.isPending
+              {weighIn.isPending
                 ? "Saving…"
                 : error
                   ? "Try again"
                   : queue && queueIdx + 1 < queue.length
                     ? "Save & next"
-                    : "Save audit"}
+                    : "Save weigh-in"}
             </Btn>
           </div>
         </ModalFooter>
diff --git a/web/src/stats.ts b/web/src/stats.ts
index a259b2b..5134c93 100644
--- a/web/src/stats.ts
+++ b/web/src/stats.ts
@@ -3,7 +3,7 @@
 // consumed. Gone items contribute spend but NOT grams (so daily averages
 // stay clean). Operates on the enriched Item[] view, not raw products.
 
-import type { Bootstrap, Item } from "./types.js";
+import type { Bin, Bootstrap, Item } from "./types.js";
 import { TYPES, helpers, enrichItems } from "./types.js";
 import { getToday, getStoredTimezone } from "./tz.js";
 
@@ -37,7 +37,8 @@ export interface Stats {
   goneCount: number;
   archivedCount: number;
   purchaseCount: number;
-  overdueAudits: Item[];
+  overdueWeighIns: Item[];
+  overdueBinChecks: Bin[];
   lowStockBulk: Item[];
   lowStockDiscreteGroups: {
     key: string;
@@ -220,7 +221,8 @@ export function computeStats(data: Bootstrap): Stats {
   }
   const avgGap = gaps.length > 0 ? gaps.reduce((a, b) => a + b, 0) / gaps.length : 0;
 
-  const overdueAudits = active.filter((p) => helpers.auditOverdue(p, todayStr));
+  const overdueWeighIns = active.filter((p) => helpers.auditOverdue(p, todayStr));
+  const overdueBinChecks = data.bins.filter((b) => helpers.binCheckOverdue(b, todayStr));
 
   const lowStockBulk = active.filter(
     (p) => p.kind === "bulk" && helpers.pctRemaining(p) < 0.25,
@@ -283,7 +285,8 @@ export function computeStats(data: Bootstrap): Stats {
     goneCount: gone.length,
     archivedCount: consumed.length + gone.length,
     purchaseCount: items.length,
-    overdueAudits,
+    overdueWeighIns,
+    overdueBinChecks,
     lowStockBulk,
     lowStockDiscreteGroups,
   };
diff --git a/web/src/types.ts b/web/src/types.ts
index b61372f..bde18c3 100644
--- a/web/src/types.ts
+++ b/web/src/types.ts
@@ -91,6 +91,8 @@ export interface Bin {
   id: string;
   name: string;
   capacity: number;
+  cadenceDays: number;
+  lastChecked: string | null;
 }
 
 export interface TypeConfig {
@@ -203,9 +205,15 @@ export const helpers = {
   auditOverdue(p: Item, today = TODAY_STR): boolean {
     if (p.status !== "active" && p.status !== "checked-out") return false;
     const cfg = TYPES.find((t) => t.id === p.type);
-    if (!cfg) return false;
+    if (!cfg || cfg.kind === "discrete") return false;
     return this.daysSinceCheck(p, today) >= cfg.cadenceDays;
   },
+  binCheckOverdue(bin: Bin, today = TODAY_STR): boolean {
+    return this.daysSinceBinCheck(bin, today) >= bin.cadenceDays;
+  },
+  daysSinceBinCheck(bin: Bin, today = TODAY_STR): number {
+    return this.daysSince(bin.lastChecked, today);
+  },
   remaining(p: Item): number {
     if (p.status !== "active" && p.status !== "checked-out") return 0;
     if (p.kind === "discrete") {
diff --git a/web/src/views/BinsView.tsx b/web/src/views/BinsView.tsx
index b288165..c9f90a6 100644
--- a/web/src/views/BinsView.tsx
+++ b/web/src/views/BinsView.tsx
@@ -2,6 +2,7 @@ import { useMemo, useState } from "react";
 import { useMutation, useQueryClient } from "@tanstack/react-query";
 import type { Bootstrap, Bin, Item } from "../types.js";
 import { helpers, enrichItems } from "../types.js";
+import { getToday, getStoredTimezone } from "../tz.js";
 import { remainingShort } from "../stats.js";
 import { fmt, TYPE_GLYPHS } from "../format.js";
 import { api } from "../api.js";
@@ -45,11 +46,13 @@ export function BinsView({
   onSelectItem,
   onAddBin,
   onEditBin,
+  onBinCheck,
 }: {
   data: Bootstrap;
   onSelectItem: (i: Item) => void;
   onAddBin: () => void;
   onEditBin: (bin: Bin) => void;
+  onBinCheck: (bin: Bin) => void;
 }) {
   const isMobile = useIsMobile();
   const qc = useQueryClient();
@@ -219,6 +222,43 @@ export function BinsView({
                         }}
                       />
                     </div>
+                    {(() => {
+                      const todayStr = getToday(getStoredTimezone());
+                      const overdue = helpers.binCheckOverdue(bin, todayStr);
+                      const days = helpers.daysSinceBinCheck(bin, todayStr);
+                      return (
+                        <div
+                          style={{
+                            display: "flex",
+                            alignItems: "center",
+                            justifyContent: "space-between",
+                            marginTop: 10,
+                          }}
+                        >
+                          <div style={{ fontSize: 11, color: overdue ? "var(--terracotta)" : "var(--ink-3)" }}>
+                            {days === Infinity ? "Never checked" : `Checked ${days}d ago`}
+                            {overdue && " · overdue"}
+                          </div>
+                          <button
+                            onClick={(e) => { e.stopPropagation(); onBinCheck(bin); }}
+                            title="Check bin"
+                            style={{
+                              background: "transparent",
+                              border: "none",
+                              padding: "2px 6px",
+                              borderRadius: "var(--r-sm)",
+                              cursor: "pointer",
+                              color: overdue ? "var(--terracotta)" : "var(--ink-3)",
+                              fontSize: 11,
+                              fontWeight: 600,
+                              textDecoration: "underline",
+                            }}
+                          >
+                            Check
+                          </button>
+                        </div>
+                      );
+                    })()}
                   </div>
                   <div style={{ padding: 8, flex: 1 }}>
                     {binItems.length === 0 && (
diff --git a/web/src/views/Dashboard.tsx b/web/src/views/Dashboard.tsx
index 888d38d..4f3b79a 100644
--- a/web/src/views/Dashboard.tsx
+++ b/web/src/views/Dashboard.tsx
@@ -1,4 +1,4 @@
-import type { Bootstrap, Item } from "../types.js";
+import type { Bin, Bootstrap, Item } from "../types.js";
 import { helpers } from "../types.js";
 import { getToday, getStoredTimezone } from "../tz.js";
 import type { Stats } from "../stats.js";
@@ -20,14 +20,16 @@ const TYPE_COLORS: Record<string, string> = {
 export function Dashboard({
   data,
   stats,
-  onAuditItem,
-  onAuditQueue,
+  onWeighInItem,
+  onWeighInQueue,
+  onBinCheck,
   onSelectItem,
 }: {
   data: Bootstrap;
   stats: Stats;
-  onAuditItem: (i: Item) => void;
-  onAuditQueue: (items: Item[]) => void;
+  onWeighInItem: (i: Item) => void;
+  onWeighInQueue: (items: Item[]) => void;
+  onBinCheck: (bin?: Bin) => void;
   onSelectItem: (i: Item) => void;
 }) {
   const isMobile = useIsMobile();
@@ -41,7 +43,8 @@ export function Dashboard({
     color: TYPE_COLORS[k] ?? "var(--ink-3)",
   }));
 
-  const overdue = stats.overdueAudits;
+  const overdue = stats.overdueWeighIns;
+  const overdueBins = stats.overdueBinChecks;
   const lowBulk = stats.lowStockBulk;
   const lowDiscrete = stats.lowStockDiscreteGroups;
 
@@ -86,7 +89,12 @@ export function Dashboard({
         {stats.goneCount} gone.
         {overdue.length > 0 && (
           <span style={{ color: "var(--terracotta)" }}>
-            {" "}· {overdue.length} audit{overdue.length === 1 ? "" : "s"} overdue.
+            {" "}· {overdue.length} weigh-in{overdue.length === 1 ? "" : "s"} overdue.
+          </span>
+        )}
+        {overdueBins.length > 0 && (
+          <span style={{ color: "var(--terracotta)" }}>
+            {" "}· {overdueBins.length} bin check{overdueBins.length === 1 ? "" : "s"} overdue.
           </span>
         )}
       </div>
@@ -182,17 +190,43 @@ export function Dashboard({
         >
           <div style={{ display: "flex", alignItems: "center", gap: 18, flexWrap: "wrap" }}>
             <div style={{ flex: 1, minWidth: 240 }}>
-              <div className="smallcaps" style={{ color: "oklch(48% 0.10 75)" }}>Audit overdue</div>
+              <div className="smallcaps" style={{ color: "oklch(48% 0.10 75)" }}>Weigh-ins overdue</div>
               <div className="serif" style={{ fontSize: 20, marginTop: 4, color: "var(--ink)" }}>
-                {overdue.length} item{overdue.length === 1 ? "" : "s"} haven't been checked in a while
+                {overdue.length} item{overdue.length === 1 ? "" : "s"} need weighing
               </div>
               <div style={{ fontSize: 12, color: "var(--ink-2)", marginTop: 4 }}>
                 {overdue.slice(0, 3).map((p) => p.name).join(" · ")}
                 {overdue.length > 3 && ` · +${overdue.length - 3} more`}
               </div>
             </div>
-            <Btn variant="secondary" icon="search" onClick={() => onAuditQueue(overdue)}>
-              Audit {overdue.length > 1 ? `all ${overdue.length}` : ""}
+            <Btn variant="secondary" icon="search" onClick={() => onWeighInQueue(overdue)}>
+              Weigh in {overdue.length > 1 ? `all ${overdue.length}` : ""}
+            </Btn>
+          </div>
+        </Card>
+      )}
+
+      {overdueBins.length > 0 && (
+        <Card
+          style={{
+            marginBottom: 18,
+            borderColor: "var(--amber)",
+            background: "var(--amber-soft)",
+          }}
+        >
+          <div style={{ display: "flex", alignItems: "center", gap: 18, flexWrap: "wrap" }}>
+            <div style={{ flex: 1, minWidth: 240 }}>
+              <div className="smallcaps" style={{ color: "oklch(48% 0.10 75)" }}>Bin checks overdue</div>
+              <div className="serif" style={{ fontSize: 20, marginTop: 4, color: "var(--ink)" }}>
+                {overdueBins.length} bin{overdueBins.length === 1 ? "" : "s"} need checking
+              </div>
+              <div style={{ fontSize: 12, color: "var(--ink-2)", marginTop: 4 }}>
+                {overdueBins.slice(0, 3).map((b) => b.name).join(" · ")}
+                {overdueBins.length > 3 && ` · +${overdueBins.length - 3} more`}
+              </div>
+            </div>
+            <Btn variant="secondary" icon="bin" onClick={() => onBinCheck()}>
+              Start bin check
             </Btn>
           </div>
         </Card>
diff --git a/web/src/views/Inventory.tsx b/web/src/views/Inventory.tsx
index b2aa11d..4771206 100644
--- a/web/src/views/Inventory.tsx
+++ b/web/src/views/Inventory.tsx
@@ -20,7 +20,7 @@ export function Inventory({
   data,
   onSelectItem,
   onAddInventory,
-  onAuditNew,
+  onWeighInNew,
   onBulkEdit,
   onBulkConsume,
   onBulkCheckout,
@@ -30,7 +30,7 @@ export function Inventory({
   data: Bootstrap;
   onSelectItem: (i: Item) => void;
   onAddInventory: () => void;
-  onAuditNew: () => void;
+  onWeighInNew: () => void;
   onBulkEdit: (items: Item[]) => void;
   onBulkConsume: (items: Item[]) => void;
   onBulkCheckout: (items: Item[]) => void;
@@ -184,7 +184,7 @@ export function Inventory({
         </div>
         {!isMobile && (
           <div style={{ display: "flex", gap: 8 }}>
-            <Btn variant="secondary" icon="check" onClick={onAuditNew}>Audit</Btn>
+            <Btn variant="secondary" icon="check" onClick={onWeighInNew}>Weigh In</Btn>
             <Btn variant="primary" icon="plus" onClick={onAddInventory}>Add inventory</Btn>
           </div>
         )}
@@ -380,7 +380,7 @@ export function Inventory({
               <option value="thc">THC %</option>
               <option value="remaining">Remaining</option>
               <option value="price">Price</option>
-              <option value="audit">Audit overdue</option>
+              <option value="audit">Weigh-in overdue</option>
             </Select>
           </div>
         </Card>
@@ -586,7 +586,7 @@ export function Inventory({
                 ["thc", "THC %"],
                 ["remaining", "Remaining"],
                 ["price", "Price"],
-                ["audit", "Audit overdue"],
+                ["audit", "Weigh-in overdue"],
               ] as [SortKey, string][]
             ).map(([k, l]) => (
               <button