diff --git a/apps/web/src/lib/api/inbox.ts b/apps/web/src/lib/api/inbox.ts
new file mode 100644
index 0000000..f075309
--- /dev/null
+++ b/apps/web/src/lib/api/inbox.ts
@@ -0,0 +1,23 @@
+import type { Deck } from '@cards/domain';
+import { listDecks } from './decks.ts';
+import { listCards } from './cards.ts';
+
+const INBOX_NAME = 'Inbox';
+
+export interface InboxStats {
+	deck: Deck | null;
+	cardCount: number;
+}
+
+/**
+ * Lädt das Inbox-Deck (Name = "Inbox", auto-erzeugt vom API beim
+ * ersten Share-Receive) und zählt die Karten darin. Liefert ein
+ * neutrales Result, wenn der User noch keinen Share empfangen hat.
+ */
+export async function loadInboxStats(): Promise<InboxStats> {
+	const decks = await listDecks();
+	const inbox = decks.decks.find((d) => d.name === INBOX_NAME) ?? null;
+	if (!inbox) return { deck: null, cardCount: 0 };
+	const cards = await listCards(inbox.id);
+	return { deck: inbox, cardCount: cards.total };
+}
diff --git a/apps/web/src/lib/components/InboxBanner.svelte b/apps/web/src/lib/components/InboxBanner.svelte
new file mode 100644
index 0000000..df5a0dc
--- /dev/null
+++ b/apps/web/src/lib/components/InboxBanner.svelte
@@ -0,0 +1,30 @@
+<script lang="ts">
+	import { onMount } from 'svelte';
+	import { loadInboxStats, type InboxStats } from '$lib/api/inbox.ts';
+
+	let stats = $state<InboxStats | null>(null);
+
+	onMount(async () => {
+		try {
+			stats = await loadInboxStats();
+		} catch {
+			// Inbox ist optional — Fehler still verschlucken, Banner bleibt weg.
+			stats = null;
+		}
+	});
+</script>
+
+{#if stats && stats.deck && stats.cardCount > 0}
+	<a
+		href="/decks/{stats.deck.id}"
+		class="block rounded-lg border border-[var(--color-primary)]/40 bg-[var(--color-primary)]/10 px-4 py-3 text-sm hover:bg-[var(--color-primary)]/15"
+	>
+		<span class="font-medium">📥 Inbox</span>
+		<span class="text-[var(--color-muted)]">·</span>
+		<span>
+			{stats.cardCount} eingegangene
+			{stats.cardCount === 1 ? 'Karte' : 'Karten'} aus anderen Apps
+		</span>
+		<span class="ml-1 text-[var(--color-muted)]">— sortieren →</span>
+	</a>
+{/if}
diff --git a/apps/web/src/routes/decks/+page.svelte b/apps/web/src/routes/decks/+page.svelte
index 35004a5..5837ce9 100644
--- a/apps/web/src/routes/decks/+page.svelte
+++ b/apps/web/src/routes/decks/+page.svelte
@@ -5,6 +5,7 @@
 	import { listDecks, deleteDeck } from '$lib/api/decks.ts';
 	import { devUser } from '$lib/auth/dev-stub.svelte.ts';
 	import { toasts } from '$lib/stores/toasts.svelte.ts';
+	import InboxBanner from '$lib/components/InboxBanner.svelte';
 
 	let decks = $state<Deck[]>([]);
 	let loading = $state(true);
@@ -54,6 +55,10 @@
 	>
 </div>
 
+<div class="mt-4">
+	<InboxBanner />
+</div>
+
 {#if loading}
 	<p class="mt-8 text-[var(--color-muted)]">Lade…</p>
 {:else if error}
diff --git a/apps/web/src/routes/study/+page.svelte b/apps/web/src/routes/study/+page.svelte
index eec479f..d062be2 100644
--- a/apps/web/src/routes/study/+page.svelte
+++ b/apps/web/src/routes/study/+page.svelte
@@ -5,6 +5,7 @@
 	import { listDecks } from '$lib/api/decks.ts';
 	import { listDueReviews } from '$lib/api/reviews.ts';
 	import { devUser } from '$lib/auth/dev-stub.svelte.ts';
+	import InboxBanner from '$lib/components/InboxBanner.svelte';
 
 	type Item = { deck: Deck; due: number };
 
@@ -37,6 +38,10 @@
 
 <h1 class="text-2xl font-semibold">Lernen</h1>
 
+<div class="mt-4">
+	<InboxBanner />
+</div>
+
 {#if loading}
 	<p class="mt-8 text-[var(--color-muted)]">Lade…</p>
 {:else}