diff --git a/deep-sea-stories/packages/web/package.json b/deep-sea-stories/packages/web/package.json
index 6141245..463afe7 100644
--- a/deep-sea-stories/packages/web/package.json
+++ b/deep-sea-stories/packages/web/package.json
@@ -35,6 +35,7 @@
 		"tailwindcss": "^4.1.13"
 	},
 	"devDependencies": {
+		"@types/gtag.js": "^0.0.20",
 		"@types/react": "^19.1.13",
 		"@types/react-dom": "^19.1.9",
 		"@vitejs/plugin-react": "^5.0.3",
diff --git a/deep-sea-stories/packages/web/src/components/PromoWidget.tsx b/deep-sea-stories/packages/web/src/components/PromoWidget.tsx
new file mode 100644
index 0000000..0289e0e
--- /dev/null
+++ b/deep-sea-stories/packages/web/src/components/PromoWidget.tsx
@@ -0,0 +1,185 @@
+import { useEffect, useRef, useState } from 'react';
+import { Button } from './ui/button';
+
+const PROMO_CODE = 'DeepSea25';
+const PROMO_URL = 'https://fishjam.swmansion.com/?utm_source=deep-sea-stories';
+const DISMISS_STORAGE_KEY = 'promo-widget-dismissed';
+const PROMO_HIDE_AFTER = new Date('2026-03-19T00:00:00Z');
+
+const PROMO_DISMISSED_EVENT = 'promo_dismissed';
+const PROMO_CODE_DISPLAYED_EVENT = 'promo_code_displayed';
+const PROMO_CODE_COPIED_EVENT = 'promo_code_copied';
+
+const readDismissedFromStorage = () => {
+	return window.localStorage.getItem(DISMISS_STORAGE_KEY) === 'true';
+};
+
+const isExpired = Date.now() >= PROMO_HIDE_AFTER.getTime();
+
+const sendGAEvent = (event: string) => {
+	if (typeof window.gtag !== 'function') {
+		console.warn('gtag not defined');
+		return;
+	}
+
+	try {
+		window.gtag('event', event, {});
+	} catch (e) {
+		console.error(`Failed to send ${event} event`, e);
+	}
+};
+
+const PromoWidget = () => {
+	const [promoVisible, setPromoVisible] = useState(false);
+	const [dismissed, setDismissed] = useState(readDismissedFromStorage);
+	const [copied, setCopied] = useState(false);
+
+	const copyResetRef = useRef<number | null>(null);
+
+	useEffect(() => {
+		return () => {
+			if (copyResetRef.current) {
+				window.clearTimeout(copyResetRef.current);
+			}
+		};
+	}, []);
+
+	useEffect(() => {
+		if (dismissed) {
+			window.localStorage.setItem(DISMISS_STORAGE_KEY, 'true');
+		}
+	}, [dismissed]);
+
+	const triggerCopiedFeedback = () => {
+		setCopied(true);
+		if (copyResetRef.current) {
+			window.clearTimeout(copyResetRef.current);
+		}
+		copyResetRef.current = window.setTimeout(() => setCopied(false), 2000);
+	};
+
+	const fallbackCopy = () => {
+		const textarea = document.createElement('textarea');
+		textarea.value = PROMO_CODE;
+		textarea.style.position = 'fixed';
+		textarea.style.opacity = '0';
+		document.body.appendChild(textarea);
+		textarea.focus();
+		textarea.select();
+		document.execCommand('copy');
+		document.body.removeChild(textarea);
+		triggerCopiedFeedback();
+		sendGAEvent(PROMO_CODE_COPIED_EVENT);
+	};
+
+	const handleGetPromo = () => {
+		sendGAEvent(PROMO_CODE_DISPLAYED_EVENT);
+		setPromoVisible(true);
+	};
+
+	const handleCopy = async () => {
+		try {
+			if (navigator.clipboard?.writeText) {
+				await navigator.clipboard.writeText(PROMO_CODE);
+				sendGAEvent(PROMO_CODE_COPIED_EVENT);
+				triggerCopiedFeedback();
+				return;
+			}
+		} catch (error) {
+			console.warn('Failed to copy using clipboard API, falling back.', error);
+		}
+
+		fallbackCopy();
+	};
+
+	const handleDismiss = () => {
+		sendGAEvent(PROMO_DISMISSED_EVENT);
+		setDismissed(true);
+	};
+
+	if (dismissed || isExpired) {
+		return null;
+	}
+
+	return (
+		<div className="pointer-events-auto text-primary">
+			<div className="relative w-[min(22rem,_calc(100vw-2rem))] rounded-4xl shadow-amber-100/15 border border-border/80 bg-background/90 p-6 shadow-xl backdrop-blur-2xl">
+				<button
+					type="button"
+					aria-label="Dismiss promo"
+					onClick={handleDismiss}
+					className="absolute right-3 top-4 rounded-full bg-background/70 px-2 py-1 text-[0.55rem] font-semibold uppercase tracking-[0.2em] text-primary/60 transition hover:text-primary"
+				>
+					I'm not interested
+				</button>
+
+				<div className="flex flex-col gap-5 text-sm text-primary/80">
+					<div>
+						<p className="font-display text-[0.55rem] uppercase tracking-[0.6em] text-primary/60">
+							Powered by
+						</p>
+						<a
+							className="font-display text-2xl text-primary underline"
+							target="_blank"
+							rel="noopener"
+							href={PROMO_URL}
+						>
+							Fishjam
+						</a>
+						<p className="mt-2">
+							The realtime infrastructure behind Deep Sea Stories.
+							<br />
+							Build AI-first audio and video experiences without touching WebRTC
+							internals.
+						</p>
+					</div>
+
+					<div>
+						<p className="mt-1">
+							Save 25% on your first three months of Regular Jar plan.
+						</p>
+					</div>
+
+					{promoVisible ? (
+						<div className="rounded-3xl border border-border/60 bg-background/80 p-4">
+							<div className="flex items-center justify-between text-[0.65rem] font-display uppercase tracking-[0.4em] text-primary/60">
+								<span>Promo code</span>
+							</div>
+							<div className="mt-3 flex flex-wrap justify-between items-center gap-3">
+								<span className="font-mono text-lg tracking-[0.4em]">
+									{PROMO_CODE}
+								</span>
+								<Button
+									type="button"
+									variant="outline"
+									className="h-10 px-4 text-[0.6rem] font-semibold uppercase tracking-[0.3em]"
+									onClick={handleCopy}
+								>
+									{copied ? 'Copied' : 'Copy'}
+								</Button>
+							</div>
+						</div>
+					) : (
+						<Button
+							type="button"
+							onClick={handleGetPromo}
+							className="h-11 w-full text-sm font-display"
+						>
+							Get a promo code
+						</Button>
+					)}
+					<a
+						href={PROMO_URL}
+						target="_blank"
+						rel="noopener"
+						className="mt-1 text-center text-[0.75rem] font-semibold tracking-[0.1em] text-primary/70 underline-offset-4 transition-colors hover:text-primary hover:underline"
+					>
+						Redeem at fishjam.swmansion.com
+					</a>
+				</div>
+			</div>
+		</div>
+	);
+};
+
+export default PromoWidget;
diff --git a/deep-sea-stories/packages/web/src/main.tsx b/deep-sea-stories/packages/web/src/main.tsx
index 1cebfbd..16f67d3 100644
--- a/deep-sea-stories/packages/web/src/main.tsx
+++ b/deep-sea-stories/packages/web/src/main.tsx
@@ -8,6 +8,7 @@ import { BrowserRouter, Route, Routes } from 'react-router';
 import Layout from './Layout.tsx';
 import HomeView from './views/HomeView.tsx';
 import RoomView from './views/RoomView.tsx';
+import PromoWidget from './components/PromoWidget.tsx';
 
 const queryClient = new QueryClient({
 	defaultOptions: {
@@ -30,6 +31,9 @@ createRoot(document.getElementById('root')!).render(
 								<Route path=":roomId" element={<RoomView />} />
 							</Routes>
 						</BrowserRouter>
+						<div className="absolute bottom-2 right-2 md:bottom-40 md:left-6 md:right-auto z-10">
+							<PromoWidget />
+						</div>
 					</Layout>
 				</FishjamProvider>
 			</TRPCClientProvider>
diff --git a/deep-sea-stories/packages/web/src/types/window.d.ts b/deep-sea-stories/packages/web/src/types/window.d.ts
new file mode 100644
index 0000000..786b646
--- /dev/null
+++ b/deep-sea-stories/packages/web/src/types/window.d.ts
@@ -0,0 +1,9 @@
+import type { Gtag } from 'gtag.js';
+
+declare global {
+	interface Window {
+		gtag: Gtag.Gtag;
+	}
+}
+
+export {};
diff --git a/deep-sea-stories/packages/web/src/views/GameView.tsx b/deep-sea-stories/packages/web/src/views/GameView.tsx
index 9a1cf61..da3855e 100644
--- a/deep-sea-stories/packages/web/src/views/GameView.tsx
+++ b/deep-sea-stories/packages/web/src/views/GameView.tsx
@@ -53,6 +53,7 @@ const GameView: FC<GameViewProps> = ({ roomId }) => {
 				<div className="absolute right-2 top-2 md:right-6 md:top-6 z-10">
 					<PlayerCountIndicator count={playerCount} />
 				</div>
+
 				<PeerGrid
 					roomId={roomId}
 					localPeer={localPeer}
diff --git a/deep-sea-stories/yarn.lock b/deep-sea-stories/yarn.lock
index 3e963fd..8d78674 100644
--- a/deep-sea-stories/yarn.lock
+++ b/deep-sea-stories/yarn.lock
@@ -364,6 +364,7 @@ __metadata:
     "@trpc/client": "npm:^11.6.0"
     "@trpc/server": "npm:^11.6.0"
     "@trpc/tanstack-react-query": "npm:^11.6.0"
+    "@types/gtag.js": "npm:^0.0.20"
     "@types/react": "npm:^19.1.13"
     "@types/react-dom": "npm:^19.1.9"
     "@vitejs/plugin-react": "npm:^5.0.3"
@@ -1824,6 +1825,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/gtag.js@npm:^0.0.20":
+  version: 0.0.20
+  resolution: "@types/gtag.js@npm:0.0.20"
+  checksum: 10c0/eb878aa3cfab6b98f5e69ef3383e9788aaea6a4d0611c72078678374dcbb4731f533ff2bf479a865536f1626a57887b1198279ff35a65d223fe4f93d9c76dbdd
+  languageName: node
+  linkType: hard
+
 "@types/node@npm:*, @types/node@npm:^24.5.2":
   version: 24.8.1
   resolution: "@types/node@npm:24.8.1"