diff --git a/artifacts/mobile/app/_layout.tsx b/artifacts/mobile/app/_layout.tsx
index e079227..53c26c3 100644
--- a/artifacts/mobile/app/_layout.tsx
+++ b/artifacts/mobile/app/_layout.tsx
@@ -5,24 +5,50 @@ import {
   Inter_700Bold,
   useFonts,
 } from "@expo-google-fonts/inter";
+import AsyncStorage from "@react-native-async-storage/async-storage";
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
-import { Stack } from "expo-router";
+import { Stack, router, useSegments } from "expo-router";
 import * as SplashScreen from "expo-splash-screen";
-import React, { useEffect } from "react";
+import React, { useEffect, useState } from "react";
 import { GestureHandlerRootView } from "react-native-gesture-handler";
 import { KeyboardProvider } from "react-native-keyboard-controller";
 import { SafeAreaProvider } from "react-native-safe-area-context";
 
 import { ErrorBoundary } from "@/components/ErrorBoundary";
 import { TimmyProvider } from "@/context/TimmyContext";
+import { ONBOARDING_COMPLETED_KEY } from "@/constants/storage-keys";
 
 SplashScreen.preventAutoHideAsync();
 
 const queryClient = new QueryClient();
 
 function RootLayoutNav() {
+  const segments = useSegments();
+  const [onboardingChecked, setOnboardingChecked] = useState(false);
+  const [needsOnboarding, setNeedsOnboarding] = useState(false);
+
+  useEffect(() => {
+    AsyncStorage.getItem(ONBOARDING_COMPLETED_KEY).then((value) => {
+      setNeedsOnboarding(value !== "true");
+      setOnboardingChecked(true);
+    });
+  }, []);
+
+  useEffect(() => {
+    if (!onboardingChecked) return;
+
+    const inOnboarding = segments[0] === "onboarding";
+
+    if (needsOnboarding && !inOnboarding) {
+      router.replace("/onboarding");
+    } else if (!needsOnboarding && inOnboarding) {
+      router.replace("/(tabs)");
+    }
+  }, [onboardingChecked, needsOnboarding, segments]);
+
   return (
     <Stack screenOptions={{ headerBackTitle: "Back" }}>
+      <Stack.Screen name="onboarding" options={{ headerShown: false, animation: "none" }} />
       <Stack.Screen name="(tabs)" options={{ headerShown: false }} />
     </Stack>
   );
diff --git a/artifacts/mobile/app/onboarding.tsx b/artifacts/mobile/app/onboarding.tsx
new file mode 100644
index 0000000..00652ce
--- /dev/null
+++ b/artifacts/mobile/app/onboarding.tsx
@@ -0,0 +1,264 @@
+import AsyncStorage from "@react-native-async-storage/async-storage";
+import { Ionicons } from "@expo/vector-icons";
+import { router } from "expo-router";
+import React, { useCallback, useRef, useState } from "react";
+import {
+  Dimensions,
+  FlatList,
+  Platform,
+  Pressable,
+  StyleSheet,
+  Text,
+  View,
+  type ViewToken,
+} from "react-native";
+import { useSafeAreaInsets } from "react-native-safe-area-context";
+
+import { TimmyFace } from "@/components/TimmyFace";
+import { Colors } from "@/constants/colors";
+import { ONBOARDING_COMPLETED_KEY } from "@/constants/storage-keys";
+
+const C = Colors.dark;
+const { width: SCREEN_WIDTH } = Dimensions.get("window");
+
+type Slide = {
+  id: string;
+  icon: React.ReactNode;
+  title: string;
+  description: string;
+};
+
+const slides: Slide[] = [
+  {
+    id: "welcome",
+    icon: <TimmyFace mood="speaking" size={140} />,
+    title: "Meet Timmy",
+    description:
+      "Your AI wizard powered by Lightning.\nAsk questions, get answers — pay only for what you use.",
+  },
+  {
+    id: "voice",
+    icon: (
+      <View style={slideStyles.iconCircle}>
+        <Ionicons name="mic" size={64} color={C.accentGlow} />
+      </View>
+    ),
+    title: "Talk, Don't Type",
+    description:
+      "Tap the mic and speak naturally.\nTimmy listens, thinks, and responds out loud.",
+  },
+  {
+    id: "lightning",
+    icon: (
+      <View style={slideStyles.iconCircle}>
+        <Ionicons name="flash" size={64} color="#F59E0B" />
+      </View>
+    ),
+    title: "Lightning Fast Payments",
+    description:
+      "Pay per request with Bitcoin Lightning.\nNo accounts, no subscriptions — just sats.",
+  },
+];
+
+function Dot({ active }: { active: boolean }) {
+  return (
+    <View
+      style={[
+        styles.dot,
+        active ? styles.dotActive : styles.dotInactive,
+      ]}
+    />
+  );
+}
+
+export default function OnboardingScreen() {
+  const insets = useSafeAreaInsets();
+  const [currentIndex, setCurrentIndex] = useState(0);
+  const flatListRef = useRef<FlatList<Slide>>(null);
+
+  const onViewableItemsChanged = useRef(
+    ({ viewableItems }: { viewableItems: ViewToken[] }) => {
+      if (viewableItems.length > 0 && viewableItems[0].index != null) {
+        setCurrentIndex(viewableItems[0].index);
+      }
+    }
+  ).current;
+
+  const viewabilityConfig = useRef({ viewAreaCoveragePercentThreshold: 50 }).current;
+
+  const isLastSlide = currentIndex === slides.length - 1;
+
+  const handleNext = useCallback(() => {
+    if (isLastSlide) {
+      completeOnboarding();
+    } else {
+      flatListRef.current?.scrollToIndex({ index: currentIndex + 1, animated: true });
+    }
+  }, [currentIndex, isLastSlide]);
+
+  const handleSkip = useCallback(() => {
+    completeOnboarding();
+  }, []);
+
+  const completeOnboarding = async () => {
+    await AsyncStorage.setItem(ONBOARDING_COMPLETED_KEY, "true");
+    router.replace("/(tabs)");
+  };
+
+  const renderSlide = ({ item }: { item: Slide }) => (
+    <View style={[styles.slide, { width: SCREEN_WIDTH }]}>
+      <View style={styles.slideIconArea}>{item.icon}</View>
+      <Text style={styles.slideTitle}>{item.title}</Text>
+      <Text style={styles.slideDescription}>{item.description}</Text>
+    </View>
+  );
+
+  return (
+    <View style={[styles.container, { paddingTop: insets.top, paddingBottom: insets.bottom }]}>
+      {/* Skip button */}
+      {!isLastSlide && (
+        <Pressable style={styles.skipButton} onPress={handleSkip}>
+          <Text style={styles.skipText}>Skip</Text>
+        </Pressable>
+      )}
+
+      {/* Slides */}
+      <FlatList
+        ref={flatListRef}
+        data={slides}
+        renderItem={renderSlide}
+        keyExtractor={(item) => item.id}
+        horizontal
+        pagingEnabled
+        showsHorizontalScrollIndicator={false}
+        bounces={false}
+        onViewableItemsChanged={onViewableItemsChanged}
+        viewabilityConfig={viewabilityConfig}
+        style={styles.flatList}
+      />
+
+      {/* Dots + Next/Get Started */}
+      <View style={styles.footer}>
+        <View style={styles.dots}>
+          {slides.map((s, i) => (
+            <Dot key={s.id} active={i === currentIndex} />
+          ))}
+        </View>
+
+        <Pressable style={styles.nextButton} onPress={handleNext}>
+          <Text style={styles.nextButtonText}>
+            {isLastSlide ? "Get Started" : "Next"}
+          </Text>
+          {!isLastSlide && (
+            <Ionicons name="arrow-forward" size={18} color="#fff" />
+          )}
+        </Pressable>
+      </View>
+    </View>
+  );
+}
+
+const slideStyles = StyleSheet.create({
+  iconCircle: {
+    width: 140,
+    height: 140,
+    borderRadius: 70,
+    backgroundColor: C.surfaceElevated,
+    borderWidth: 1,
+    borderColor: C.border,
+    alignItems: "center",
+    justifyContent: "center",
+  },
+});
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    backgroundColor: C.background,
+  },
+  skipButton: {
+    position: "absolute",
+    top: Platform.OS === "web" ? 20 : 56,
+    right: 24,
+    zIndex: 10,
+    padding: 8,
+  },
+  skipText: {
+    fontSize: 15,
+    fontFamily: "Inter_500Medium",
+    color: C.textSecondary,
+  },
+  flatList: {
+    flex: 1,
+  },
+  slide: {
+    flex: 1,
+    alignItems: "center",
+    justifyContent: "center",
+    paddingHorizontal: 40,
+  },
+  slideIconArea: {
+    marginBottom: 40,
+    alignItems: "center",
+    justifyContent: "center",
+    shadowColor: C.accent,
+    shadowOffset: { width: 0, height: 0 },
+    shadowOpacity: 0.25,
+    shadowRadius: 30,
+    elevation: 0,
+  },
+  slideTitle: {
+    fontSize: 28,
+    fontFamily: "Inter_700Bold",
+    color: C.text,
+    textAlign: "center",
+    marginBottom: 16,
+    letterSpacing: -0.5,
+  },
+  slideDescription: {
+    fontSize: 16,
+    fontFamily: "Inter_400Regular",
+    color: C.textSecondary,
+    textAlign: "center",
+    lineHeight: 24,
+  },
+  footer: {
+    paddingHorizontal: 24,
+    paddingBottom: 24,
+    gap: 24,
+    alignItems: "center",
+  },
+  dots: {
+    flexDirection: "row",
+    gap: 8,
+  },
+  dot: {
+    height: 8,
+    borderRadius: 4,
+  },
+  dotActive: {
+    width: 24,
+    backgroundColor: C.accent,
+  },
+  dotInactive: {
+    width: 8,
+    backgroundColor: C.textMuted,
+  },
+  nextButton: {
+    flexDirection: "row",
+    alignItems: "center",
+    justifyContent: "center",
+    gap: 8,
+    backgroundColor: C.accent,
+    paddingVertical: 16,
+    paddingHorizontal: 32,
+    borderRadius: 16,
+    width: "100%",
+    maxWidth: 320,
+  },
+  nextButtonText: {
+    fontSize: 17,
+    fontFamily: "Inter_600SemiBold",
+    color: "#fff",
+  },
+});
diff --git a/artifacts/mobile/constants/storage-keys.ts b/artifacts/mobile/constants/storage-keys.ts
new file mode 100644
index 0000000..e07ff30
--- /dev/null
+++ b/artifacts/mobile/constants/storage-keys.ts
@@ -0,0 +1 @@
+export const ONBOARDING_COMPLETED_KEY = "app.onboarding_completed";