diff --git a/packages/tourmaline/src/lib/client/visit-history.ts b/packages/tourmaline/src/lib/client/visit-history.ts
new file mode 100644
index 0000000..0641c04
--- /dev/null
+++ b/packages/tourmaline/src/lib/client/visit-history.ts
@@ -0,0 +1,80 @@
+/**
+ * "Since your last visit" delta — localStorage only, no server infra.
+ *
+ * A full recurring digest (email/Bluesky push on a schedule) would need
+ * external infrastructure this stateless app doesn't have (a scheduler, an
+ * email provider, a subscriber list). This is the on-demand equivalent:
+ * remember what a listener's profile looked like the last time they opened
+ * it on this browser, and surface what's changed since, computed the
+ * moment they return rather than pushed to them.
+ */
+import type { ListenerProfile } from "$lib/types";
+
+interface VisitSnapshot {
+  totalScrobbles: number;
+  uniqueArtists: number;
+  /** ms epoch */
+  timestamp: number;
+}
+
+export interface VisitDelta {
+  daysSinceLastVisit: number;
+  newScrobbles: number;
+  newArtistCount: number;
+  /** Artists first heard since the last visit, most recent first. */
+  newArtists: string[];
+}
+
+const KEY_PREFIX = "tm:visit:";
+
+function readSnapshot(did: string): VisitSnapshot | null {
+  try {
+    const raw = localStorage.getItem(KEY_PREFIX + did);
+    if (!raw) return null;
+    return JSON.parse(raw) as VisitSnapshot;
+  } catch {
+    return null;
+  }
+}
+
+function writeSnapshot(did: string, profile: ListenerProfile): void {
+  try {
+    const snapshot: VisitSnapshot = {
+      totalScrobbles: profile.totalScrobbles,
+      uniqueArtists: profile.uniqueArtists,
+      timestamp: Date.now(),
+    };
+    localStorage.setItem(KEY_PREFIX + did, JSON.stringify(snapshot));
+  } catch {
+    /* storage full or unavailable — silent fail */
+  }
+}
+
+/**
+ * Reads the last-visit snapshot (if any), computes what's changed against
+ * the current profile, then overwrites the snapshot with the current state.
+ * Call once per completed profile load — returns null on a first-ever visit.
+ */
+export function checkInAndComputeDelta(did: string, profile: ListenerProfile): VisitDelta | null {
+  const previous = readSnapshot(did);
+  writeSnapshot(did, profile);
+
+  if (!previous) return null;
+
+  const daysSinceLastVisit = Math.floor((Date.now() - previous.timestamp) / (1000 * 60 * 60 * 24));
+
+  // Nothing meaningful to report for a same-day repeat visit.
+  if (daysSinceLastVisit < 1) return null;
+
+  const newArtists = profile.discoveredArtists
+    .filter((a) => new Date(a.firstListen + "T00:00:00Z").getTime() > previous.timestamp)
+    .sort((a, b) => b.firstListen.localeCompare(a.firstListen))
+    .map((a) => a.name);
+
+  return {
+    daysSinceLastVisit,
+    newScrobbles: Math.max(0, profile.totalScrobbles - previous.totalScrobbles),
+    newArtistCount: Math.max(0, profile.uniqueArtists - previous.uniqueArtists),
+    newArtists,
+  };
+}
diff --git a/packages/tourmaline/src/routes/profile/[did]/+page.svelte b/packages/tourmaline/src/routes/profile/[did]/+page.svelte
index c59d872..c60961e 100644
--- a/packages/tourmaline/src/routes/profile/[did]/+page.svelte
+++ b/packages/tourmaline/src/routes/profile/[did]/+page.svelte
@@ -41,6 +41,7 @@
 	import Recommendations from './Recommendations.svelte';
 	import TrackPreview from '$lib/components/TrackPreview.svelte';
 	import ListeningContext from './ListeningContext.svelte';
+	import { checkInAndComputeDelta, type VisitDelta } from '$lib/client/visit-history';
 
 	function noiseAvatar(canvas: HTMLCanvasElement, seed: string) {
 		renderNoiseAvatar(canvas, seed, { displaySize: 32, gridSize: 5 });
@@ -88,6 +89,9 @@
 	let elapsed = $state(0);
 	let enrichElapsed = $state(0);
 
+	// Since-last-visit delta (localStorage only, no server tracking)
+	let visitDelta = $state<VisitDelta | null>(null);
+
 	// Profile data
 	let results = $state<ProfileResults>(emptyResults());
 
@@ -127,6 +131,12 @@
 				},
 				onResults: (r) => { results = r; }
 			});
+
+			const allTimeProfile = results.all?.profile;
+			if (allTimeProfile && allTimeProfile.totalScrobbles > 0) {
+				visitDelta = checkInAndComputeDelta(did, allTimeProfile);
+			}
+
 			console.log(`[tourmaline] complete in ${((performance.now() - t0) / 1000).toFixed(1)}s`);
 		} catch (e) {
 			phase = 'error';
@@ -169,6 +179,26 @@
 		{/if}
 	</header>
 
+	<!-- ── Since your last visit ─────────────────────────────────────────────── -->
+	{#if visitDelta}
+		<div class="mb-6 rounded border border-[var(--accent)]/30 bg-[var(--accent)]/5 p-3.5 sm:mb-8 sm:p-4">
+			<p class="text-sm text-[var(--text)]">
+				Welcome back — {visitDelta.daysSinceLastVisit === 1 ? 'a day' : `${visitDelta.daysSinceLastVisit} days`} since your last visit.
+			</p>
+			<p class="mt-1 text-xs text-[var(--text-muted)]">
+				{#if visitDelta.newScrobbles > 0}
+					+{visitDelta.newScrobbles.toLocaleString()} scrobble{visitDelta.newScrobbles === 1 ? '' : 's'}
+				{/if}
+				{#if visitDelta.newArtists.length > 0}
+					{visitDelta.newScrobbles > 0 ? '· ' : ''}{visitDelta.newArtists.length} new artist{visitDelta.newArtists.length === 1 ? '' : 's'}: {visitDelta.newArtists.slice(0, 5).join(', ')}{visitDelta.newArtists.length > 5 ? `, +${visitDelta.newArtists.length - 5} more` : ''}
+				{/if}
+				{#if visitDelta.newScrobbles === 0 && visitDelta.newArtists.length === 0}
+					No new scrobbles since then.
+				{/if}
+			</p>
+		</div>
+	{/if}
+
 	<!-- ── Loading state (before any profile exists yet) ────────────────────── -->
 	{#if phase === 'fetching' || phase === 'idle'}
 		<div class="mb-8 grid gap-4">