Move to monorepo for React Native!

apps/expo/.gitignore

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+# Learn more https://docs.github.com/en/get-started/getting-started-with-git/ignoring-files
+
+# dependencies
+node_modules/
+
+# Expo
+.expo/
+dist/
+web-build/
+expo-env.d.ts
+
+# Native
+.kotlin/
+*.orig.*
+*.jks
+*.p8
+*.p12
+*.key
+*.mobileprovision
+
+# Metro
+.metro-health-check*
+
+# debug
+npm-debug.*
+yarn-debug.*
+yarn-error.*
+
+# macOS
+.DS_Store
+*.pem
+
+# local env files
+.env*.local
+
+# typescript
+*.tsbuildinfo
+
+app-example
+
+# generated native folders
+/ios
+/android

apps/expo/app.json

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+{
+  "expo": {
+    "name": "techtracker-expo",
+    "slug": "techtracker-expo",
+    "version": "1.0.0",
+    "orientation": "portrait",
+    "icon": "./assets/images/icon.png",
+    "scheme": "techtrackerexpo",
+    "userInterfaceStyle": "automatic",
+    "newArchEnabled": true,
+    "ios": {
+      "supportsTablet": true
+    },
+    "android": {
+      "adaptiveIcon": {
+        "backgroundColor": "#E6F4FE",
+        "foregroundImage": "./assets/images/android-icon-foreground.png",
+        "backgroundImage": "./assets/images/android-icon-background.png",
+        "monochromeImage": "./assets/images/android-icon-monochrome.png"
+      },
+      "edgeToEdgeEnabled": true,
+      "predictiveBackGestureEnabled": false
+    },
+    "web": {
+      "output": "static",
+      "favicon": "./assets/images/favicon.png"
+    },
+    "plugins": [
+      "expo-router",
+      [
+        "expo-splash-screen",
+        {
+          "image": "./assets/images/splash-icon.png",
+          "imageWidth": 200,
+          "resizeMode": "contain",
+          "backgroundColor": "#ffffff",
+          "dark": {
+            "backgroundColor": "#000000"
+          }
+        }
+      ]
+    ],
+    "experiments": {
+      "typedRoutes": true,
+      "reactCompiler": true
+    }
+  }
+}

apps/expo/eslint.config.js

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+// https://docs.expo.dev/guides/using-eslint/
+const { defineConfig } = require('eslint/config');
+const expoConfig = require('eslint-config-expo/flat');
+
+module.exports = defineConfig([
+  expoConfig,
+  {
+    ignores: ['dist/*'],
+  },
+]);

apps/expo/package.json

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+{
+  "name": "techtracker-expo",
+  "main": "expo-router/entry",
+  "version": "1.0.0",
+  "scripts": {
+    "start": "expo start",
+    "dev": "expo start",
+    "android": "expo start --android",
+    "ios": "expo start --ios",
+    "web": "expo start --web",
+    "lint": "expo lint"
+  },
+  "dependencies": {
+    "@expo/vector-icons": "^15.0.2",
+    "@react-navigation/bottom-tabs": "^7.4.0",
+    "@react-navigation/elements": "^2.6.3",
+    "@react-navigation/native": "^7.1.8",
+    "expo": "~54.0.4",
+    "expo-constants": "~18.0.8",
+    "expo-font": "~14.0.8",
+    "expo-haptics": "~15.0.7",
+    "expo-image": "~3.0.8",
+    "expo-linking": "~8.0.8",
+    "expo-router": "~6.0.2",
+    "expo-splash-screen": "~31.0.9",
+    "expo-status-bar": "~3.0.8",
+    "expo-symbols": "~1.0.7",
+    "expo-system-ui": "~6.0.7",
+    "expo-web-browser": "~15.0.7",
+    "react": "19.1.0",
+    "react-dom": "19.1.0",
+    "react-native": "0.81.4",
+    "react-native-gesture-handler": "~2.28.0",
+    "react-native-worklets": "0.5.1",
+    "react-native-reanimated": "~4.1.0",
+    "react-native-safe-area-context": "~5.6.0",
+    "react-native-screens": "~4.16.0",
+    "react-native-web": "~0.21.0"
+  },
+  "devDependencies": {
+    "@types/react": "~19.1.0",
+    "eslint-config-expo": "~10.0.0"
+  },
+  "private": true
+}

apps/expo/src/app/(tabs)/_layout.tsx

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+import { Tabs } from 'expo-router';
+import React from 'react';
+
+import { HapticTab } from '@/components/haptic-tab';
+import { IconSymbol } from '@/components/ui/icon-symbol';
+import { Colors } from '@/constants/theme';
+import { useColorScheme } from '@/hooks/use-color-scheme';
+
+export default function TabLayout() {
+  const colorScheme = useColorScheme();
+
+  return (
+    <Tabs
+      screenOptions={{
+        tabBarActiveTintColor: Colors[colorScheme ?? 'light'].tint,
+        headerShown: false,
+        tabBarButton: HapticTab,
+      }}>
+      <Tabs.Screen
+        name="index"
+        options={{
+          title: 'Home',
+          tabBarIcon: ({ color }) => <IconSymbol size={28} name="house.fill" color={color} />,
+        }}
+      />
+      <Tabs.Screen
+        name="explore"
+        options={{
+          title: 'Explore',
+          tabBarIcon: ({ color }) => <IconSymbol size={28} name="paperplane.fill" color={color} />,
+        }}
+      />
+    </Tabs>
+  );
+}

apps/expo/src/app/(tabs)/explore.tsx

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+import { Image } from 'expo-image';
+import { Platform, StyleSheet } from 'react-native';
+
+import { Collapsible } from '@/components/ui/collapsible';
+import { ExternalLink } from '@/components/external-link';
+import ParallaxScrollView from '@/components/parallax-scroll-view';
+import { ThemedText } from '@/components/themed-text';
+import { ThemedView } from '@/components/themed-view';
+import { IconSymbol } from '@/components/ui/icon-symbol';
+import { Fonts } from '@/constants/theme';
+
+export default function TabTwoScreen() {
+  return (
+    <ParallaxScrollView
+      headerBackgroundColor={{ light: '#D0D0D0', dark: '#353636' }}
+      headerImage={
+        <IconSymbol
+          size={310}
+          color="#808080"
+          name="chevron.left.forwardslash.chevron.right"
+          style={styles.headerImage}
+        />
+      }>
+      <ThemedView style={styles.titleContainer}>
+        <ThemedText
+          type="title"
+          style={{
+            fontFamily: Fonts.rounded,
+          }}>
+          Explore
+        </ThemedText>
+      </ThemedView>
+      <ThemedText>This app includes example code to help you get started.</ThemedText>
+      <Collapsible title="File-based routing">
+        <ThemedText>
+          This app has two screens:{' '}
+          <ThemedText type="defaultSemiBold">app/(tabs)/index.tsx</ThemedText> and{' '}
+          <ThemedText type="defaultSemiBold">app/(tabs)/explore.tsx</ThemedText>
+        </ThemedText>
+        <ThemedText>
+          The layout file in <ThemedText type="defaultSemiBold">app/(tabs)/_layout.tsx</ThemedText>{' '}
+          sets up the tab navigator.
+        </ThemedText>
+        <ExternalLink href="https://docs.expo.dev/router/introduction">
+          <ThemedText type="link">Learn more</ThemedText>
+        </ExternalLink>
+      </Collapsible>
+      <Collapsible title="Android, iOS, and web support">
+        <ThemedText>
+          You can open this project on Android, iOS, and the web. To open the web version, press{' '}
+          <ThemedText type="defaultSemiBold">w</ThemedText> in the terminal running this project.
+        </ThemedText>
+      </Collapsible>
+      <Collapsible title="Images">
+        <ThemedText>
+          For static images, you can use the <ThemedText type="defaultSemiBold">@2x</ThemedText> and{' '}
+          <ThemedText type="defaultSemiBold">@3x</ThemedText> suffixes to provide files for
+          different screen densities
+        </ThemedText>
+        <Image
+          source={require('@/assets/images/react-logo.png')}
+          style={{ width: 100, height: 100, alignSelf: 'center' }}
+        />
+        <ExternalLink href="https://reactnative.dev/docs/images">
+          <ThemedText type="link">Learn more</ThemedText>
+        </ExternalLink>
+      </Collapsible>
+      <Collapsible title="Light and dark mode components">
+        <ThemedText>
+          This template has light and dark mode support. The{' '}
+          <ThemedText type="defaultSemiBold">useColorScheme()</ThemedText> hook lets you inspect
+          what the user&apos;s current color scheme is, and so you can adjust UI colors accordingly.
+        </ThemedText>
+        <ExternalLink href="https://docs.expo.dev/develop/user-interface/color-themes/">
+          <ThemedText type="link">Learn more</ThemedText>
+        </ExternalLink>
+      </Collapsible>
+      <Collapsible title="Animations">
+        <ThemedText>
+          This template includes an example of an animated component. The{' '}
+          <ThemedText type="defaultSemiBold">components/HelloWave.tsx</ThemedText> component uses
+          the powerful{' '}
+          <ThemedText type="defaultSemiBold" style={{ fontFamily: Fonts.mono }}>
+            react-native-reanimated
+          </ThemedText>{' '}
+          library to create a waving hand animation.
+        </ThemedText>
+        {Platform.select({
+          ios: (
+            <ThemedText>
+              The <ThemedText type="defaultSemiBold">components/ParallaxScrollView.tsx</ThemedText>{' '}
+              component provides a parallax effect for the header image.
+            </ThemedText>
+          ),
+        })}
+      </Collapsible>
+    </ParallaxScrollView>
+  );
+}
+
+const styles = StyleSheet.create({
+  headerImage: {
+    color: '#808080',
+    bottom: -90,
+    left: -35,
+    position: 'absolute',
+  },
+  titleContainer: {
+    flexDirection: 'row',
+    gap: 8,
+  },
+});

apps/expo/src/app/(tabs)/index.tsx

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+import { Image } from 'expo-image';
+import { Platform, StyleSheet } from 'react-native';
+
+import { HelloWave } from '@/components/hello-wave';
+import ParallaxScrollView from '@/components/parallax-scroll-view';
+import { ThemedText } from '@/components/themed-text';
+import { ThemedView } from '@/components/themed-view';
+import { Link } from 'expo-router';
+
+export default function HomeScreen() {
+  return (
+    <ParallaxScrollView
+      headerBackgroundColor={{ light: '#A1CEDC', dark: '#1D3D47' }}
+      headerImage={
+        <Image
+          source={require('@/assets/images/partial-react-logo.png')}
+          style={styles.reactLogo}
+        />
+      }>
+      <ThemedView style={styles.titleContainer}>
+        <ThemedText type="title">Welcome!</ThemedText>
+        <HelloWave />
+      </ThemedView>
+      <ThemedView style={styles.stepContainer}>
+        <ThemedText type="subtitle">Step 1: Try it</ThemedText>
+        <ThemedText>
+          Edit <ThemedText type="defaultSemiBold">app/(tabs)/index.tsx</ThemedText> to see changes.
+          Press{' '}
+          <ThemedText type="defaultSemiBold">
+            {Platform.select({
+              ios: 'cmd + d',
+              android: 'cmd + m',
+              web: 'F12',
+            })}
+          </ThemedText>{' '}
+          to open developer tools.
+        </ThemedText>
+      </ThemedView>
+      <ThemedView style={styles.stepContainer}>
+        <Link href="/modal">
+          <Link.Trigger>
+            <ThemedText type="subtitle">Step 2: Explore</ThemedText>
+          </Link.Trigger>
+          <Link.Preview />
+          <Link.Menu>
+            <Link.MenuAction title="Action" icon="cube" onPress={() => alert('Action pressed')} />
+            <Link.MenuAction
+              title="Share"
+              icon="square.and.arrow.up"
+              onPress={() => alert('Share pressed')}
+            />
+            <Link.Menu title="More" icon="ellipsis">
+              <Link.MenuAction
+                title="Delete"
+                icon="trash"
+                destructive
+                onPress={() => alert('Delete pressed')}
+              />
+            </Link.Menu>
+          </Link.Menu>
+        </Link>
+
+        <ThemedText>
+          {`Tap the Explore tab to learn more about what's included in this starter app.`}
+        </ThemedText>
+      </ThemedView>
+      <ThemedView style={styles.stepContainer}>
+        <ThemedText type="subtitle">Step 3: Get a fresh start</ThemedText>
+        <ThemedText>
+          {`When you're ready, run `}
+          <ThemedText type="defaultSemiBold">npm run reset-project</ThemedText> to get a fresh{' '}
+          <ThemedText type="defaultSemiBold">app</ThemedText> directory. This will move the current{' '}
+          <ThemedText type="defaultSemiBold">app</ThemedText> to{' '}
+          <ThemedText type="defaultSemiBold">app-example</ThemedText>.
+        </ThemedText>
+      </ThemedView>
+    </ParallaxScrollView>
+  );
+}
+
+const styles = StyleSheet.create({
+  titleContainer: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    gap: 8,
+  },
+  stepContainer: {
+    gap: 8,
+    marginBottom: 8,
+  },
+  reactLogo: {
+    height: 178,
+    width: 290,
+    bottom: 0,
+    left: 0,
+    position: 'absolute',
+  },
+});

apps/expo/src/app/_layout.tsx

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+import { DarkTheme, DefaultTheme, ThemeProvider } from '@react-navigation/native';
+import { Stack } from 'expo-router';
+import { StatusBar } from 'expo-status-bar';
+import 'react-native-reanimated';
+
+import { useColorScheme } from '@/hooks/use-color-scheme';
+
+export const unstable_settings = {
+  anchor: '(tabs)',
+};
+
+export default function RootLayout() {
+  const colorScheme = useColorScheme();
+
+  return (
+    <ThemeProvider value={colorScheme === 'dark' ? DarkTheme : DefaultTheme}>
+      <Stack>
+        <Stack.Screen name="(tabs)" options={{ headerShown: false }} />
+        <Stack.Screen name="modal" options={{ presentation: 'modal', title: 'Modal' }} />
+      </Stack>
+      <StatusBar style="auto" />
+    </ThemeProvider>
+  );
+}

apps/expo/src/app/modal.tsx

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+import { Link } from 'expo-router';
+import { StyleSheet } from 'react-native';
+
+import { ThemedText } from '@/components/themed-text';
+import { ThemedView } from '@/components/themed-view';
+
+export default function ModalScreen() {
+  return (
+    <ThemedView style={styles.container}>
+      <ThemedText type="title">This is a modal</ThemedText>
+      <Link href="/" dismissTo style={styles.link}>
+        <ThemedText type="link">Go to home screen</ThemedText>
+      </Link>
+    </ThemedView>
+  );
+}
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    alignItems: 'center',
+    justifyContent: 'center',
+    padding: 20,
+  },
+  link: {
+    marginTop: 15,
+    paddingVertical: 15,
+  },
+});

apps/expo/src/components/external-link.tsx

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+import { Href, Link } from 'expo-router';
+import { openBrowserAsync, WebBrowserPresentationStyle } from 'expo-web-browser';
+import { type ComponentProps } from 'react';
+
+type Props = Omit<ComponentProps<typeof Link>, 'href'> & { href: Href & string };
+
+export function ExternalLink({ href, ...rest }: Props) {
+  return (
+    <Link
+      target="_blank"
+      {...rest}
+      href={href}
+      onPress={async (event) => {
+        if (process.env.EXPO_OS !== 'web') {
+          // Prevent the default behavior of linking to the default browser on native.
+          event.preventDefault();
+          // Open the link in an in-app browser.
+          await openBrowserAsync(href, {
+            presentationStyle: WebBrowserPresentationStyle.AUTOMATIC,
+          });
+        }
+      }}
+    />
+  );
+}

apps/expo/src/components/haptic-tab.tsx

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+import { BottomTabBarButtonProps } from '@react-navigation/bottom-tabs';
+import { PlatformPressable } from '@react-navigation/elements';
+import * as Haptics from 'expo-haptics';
+
+export function HapticTab(props: BottomTabBarButtonProps) {
+  return (
+    <PlatformPressable
+      {...props}
+      onPressIn={(ev) => {
+        if (process.env.EXPO_OS === 'ios') {
+          // Add a soft haptic feedback when pressing down on the tabs.
+          Haptics.impactAsync(Haptics.ImpactFeedbackStyle.Light);
+        }
+        props.onPressIn?.(ev);
+      }}
+    />
+  );
+}

apps/expo/src/components/hello-wave.tsx

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+import Animated from 'react-native-reanimated';
+
+export function HelloWave() {
+  return (
+    <Animated.Text
+      style={{
+        fontSize: 28,
+        lineHeight: 32,
+        marginTop: -6,
+        animationName: {
+          '50%': { transform: [{ rotate: '25deg' }] },
+        },
+        animationIterationCount: 4,
+        animationDuration: '300ms',
+      }}>
+      👋
+    </Animated.Text>
+  );
+}

apps/expo/src/components/parallax-scroll-view.tsx

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+import type { PropsWithChildren, ReactElement } from 'react';
+import { StyleSheet } from 'react-native';
+import Animated, {
+  interpolate,
+  useAnimatedRef,
+  useAnimatedStyle,
+  useScrollOffset,
+} from 'react-native-reanimated';
+
+import { ThemedView } from '@/components/themed-view';
+import { useColorScheme } from '@/hooks/use-color-scheme';
+import { useThemeColor } from '@/hooks/use-theme-color';
+
+const HEADER_HEIGHT = 250;
+
+type Props = PropsWithChildren<{
+  headerImage: ReactElement;
+  headerBackgroundColor: { dark: string; light: string };
+}>;
+
+export default function ParallaxScrollView({
+  children,
+  headerImage,
+  headerBackgroundColor,
+}: Props) {
+  const backgroundColor = useThemeColor({}, 'background');
+  const colorScheme = useColorScheme() ?? 'light';
+  const scrollRef = useAnimatedRef<Animated.ScrollView>();
+  const scrollOffset = useScrollOffset(scrollRef);
+  const headerAnimatedStyle = useAnimatedStyle(() => {
+    return {
+      transform: [
+        {
+          translateY: interpolate(
+            scrollOffset.value,
+            [-HEADER_HEIGHT, 0, HEADER_HEIGHT],
+            [-HEADER_HEIGHT / 2, 0, HEADER_HEIGHT * 0.75]
+          ),
+        },
+        {
+          scale: interpolate(scrollOffset.value, [-HEADER_HEIGHT, 0, HEADER_HEIGHT], [2, 1, 1]),
+        },
+      ],
+    };
+  });
+
+  return (
+    <Animated.ScrollView
+      ref={scrollRef}
+      style={{ backgroundColor, flex: 1 }}
+      scrollEventThrottle={16}>
+      <Animated.View
+        style={[
+          styles.header,
+          { backgroundColor: headerBackgroundColor[colorScheme] },
+          headerAnimatedStyle,
+        ]}>
+        {headerImage}
+      </Animated.View>
+      <ThemedView style={styles.content}>{children}</ThemedView>
+    </Animated.ScrollView>
+  );
+}
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+  },
+  header: {
+    height: HEADER_HEIGHT,
+    overflow: 'hidden',
+  },
+  content: {
+    flex: 1,
+    padding: 32,
+    gap: 16,
+    overflow: 'hidden',
+  },
+});

apps/expo/src/components/themed-text.tsx

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+import { StyleSheet, Text, type TextProps } from 'react-native';
+
+import { useThemeColor } from '@/hooks/use-theme-color';
+
+export type ThemedTextProps = TextProps & {
+  lightColor?: string;
+  darkColor?: string;
+  type?: 'default' | 'title' | 'defaultSemiBold' | 'subtitle' | 'link';
+};
+
+export function ThemedText({
+  style,
+  lightColor,
+  darkColor,
+  type = 'default',
+  ...rest
+}: ThemedTextProps) {
+  const color = useThemeColor({ light: lightColor, dark: darkColor }, 'text');
+
+  return (
+    <Text
+      style={[
+        { color },
+        type === 'default' ? styles.default : undefined,
+        type === 'title' ? styles.title : undefined,
+        type === 'defaultSemiBold' ? styles.defaultSemiBold : undefined,
+        type === 'subtitle' ? styles.subtitle : undefined,
+        type === 'link' ? styles.link : undefined,
+        style,
+      ]}
+      {...rest}
+    />
+  );
+}
+
+const styles = StyleSheet.create({
+  default: {
+    fontSize: 16,
+    lineHeight: 24,
+  },
+  defaultSemiBold: {
+    fontSize: 16,
+    lineHeight: 24,
+    fontWeight: '600',
+  },
+  title: {
+    fontSize: 32,
+    fontWeight: 'bold',
+    lineHeight: 32,
+  },
+  subtitle: {
+    fontSize: 20,
+    fontWeight: 'bold',
+  },
+  link: {
+    lineHeight: 30,
+    fontSize: 16,
+    color: '#0a7ea4',
+  },
+});

apps/expo/src/components/themed-view.tsx

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+import { View, type ViewProps } from 'react-native';
+
+import { useThemeColor } from '@/hooks/use-theme-color';
+
+export type ThemedViewProps = ViewProps & {
+  lightColor?: string;
+  darkColor?: string;
+};
+
+export function ThemedView({ style, lightColor, darkColor, ...otherProps }: ThemedViewProps) {
+  const backgroundColor = useThemeColor({ light: lightColor, dark: darkColor }, 'background');
+
+  return <View style={[{ backgroundColor }, style]} {...otherProps} />;
+}

apps/expo/src/components/ui/collapsible.tsx

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+import { PropsWithChildren, useState } from 'react';
+import { StyleSheet, TouchableOpacity } from 'react-native';
+
+import { ThemedText } from '@/components/themed-text';
+import { ThemedView } from '@/components/themed-view';
+import { IconSymbol } from '@/components/ui/icon-symbol';
+import { Colors } from '@/constants/theme';
+import { useColorScheme } from '@/hooks/use-color-scheme';
+
+export function Collapsible({ children, title }: PropsWithChildren & { title: string }) {
+  const [isOpen, setIsOpen] = useState(false);
+  const theme = useColorScheme() ?? 'light';
+
+  return (
+    <ThemedView>
+      <TouchableOpacity
+        style={styles.heading}
+        onPress={() => setIsOpen((value) => !value)}
+        activeOpacity={0.8}>
+        <IconSymbol
+          name="chevron.right"
+          size={18}
+          weight="medium"
+          color={theme === 'light' ? Colors.light.icon : Colors.dark.icon}
+          style={{ transform: [{ rotate: isOpen ? '90deg' : '0deg' }] }}
+        />
+
+        <ThemedText type="defaultSemiBold">{title}</ThemedText>
+      </TouchableOpacity>
+      {isOpen && <ThemedView style={styles.content}>{children}</ThemedView>}
+    </ThemedView>
+  );
+}
+
+const styles = StyleSheet.create({
+  heading: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    gap: 6,
+  },
+  content: {
+    marginTop: 6,
+    marginLeft: 24,
+  },
+});

apps/expo/src/components/ui/icon-symbol.ios.tsx

@@ -0,0 +1,32 @@
+import { SymbolView, SymbolViewProps, SymbolWeight } from 'expo-symbols';
+import { StyleProp, ViewStyle } from 'react-native';
+
+export function IconSymbol({
+  name,
+  size = 24,
+  color,
+  style,
+  weight = 'regular',
+}: {
+  name: SymbolViewProps['name'];
+  size?: number;
+  color: string;
+  style?: StyleProp<ViewStyle>;
+  weight?: SymbolWeight;
+}) {
+  return (
+    <SymbolView
+      weight={weight}
+      tintColor={color}
+      resizeMode="scaleAspectFit"
+      name={name}
+      style={[
+        {
+          width: size,
+          height: size,
+        },
+        style,
+      ]}
+    />
+  );
+}

apps/expo/src/components/ui/icon-symbol.tsx

@@ -0,0 +1,41 @@
+// Fallback for using MaterialIcons on Android and web.
+
+import MaterialIcons from '@expo/vector-icons/MaterialIcons';
+import { SymbolWeight, SymbolViewProps } from 'expo-symbols';
+import { ComponentProps } from 'react';
+import { OpaqueColorValue, type StyleProp, type TextStyle } from 'react-native';
+
+type IconMapping = Record<SymbolViewProps['name'], ComponentProps<typeof MaterialIcons>['name']>;
+type IconSymbolName = keyof typeof MAPPING;
+
+/**
+ * Add your SF Symbols to Material Icons mappings here.
+ * - see Material Icons in the [Icons Directory](https://icons.expo.fyi).
+ * - see SF Symbols in the [SF Symbols](https://developer.apple.com/sf-symbols/) app.
+ */
+const MAPPING = {
+  'house.fill': 'home',
+  'paperplane.fill': 'send',
+  'chevron.left.forwardslash.chevron.right': 'code',
+  'chevron.right': 'chevron-right',
+} as IconMapping;
+
+/**
+ * An icon component that uses native SF Symbols on iOS, and Material Icons on Android and web.
+ * This ensures a consistent look across platforms, and optimal resource usage.
+ * Icon `name`s are based on SF Symbols and require manual mapping to Material Icons.
+ */
+export function IconSymbol({
+  name,
+  size = 24,
+  color,
+  style,
+}: {
+  name: IconSymbolName;
+  size?: number;
+  color: string | OpaqueColorValue;
+  style?: StyleProp<TextStyle>;
+  weight?: SymbolWeight;
+}) {
+  return <MaterialIcons color={color} size={size} name={MAPPING[name]} style={style} />;
+}

apps/expo/src/constants/theme.ts

@@ -0,0 +1,53 @@
+/**
+ * Below are the colors that are used in the app. The colors are defined in the light and dark mode.
+ * There are many other ways to style your app. For example, [Nativewind](https://www.nativewind.dev/), [Tamagui](https://tamagui.dev/), [unistyles](https://reactnativeunistyles.vercel.app), etc.
+ */
+
+import { Platform } from 'react-native';
+
+const tintColorLight = '#0a7ea4';
+const tintColorDark = '#fff';
+
+export const Colors = {
+  light: {
+    text: '#11181C',
+    background: '#fff',
+    tint: tintColorLight,
+    icon: '#687076',
+    tabIconDefault: '#687076',
+    tabIconSelected: tintColorLight,
+  },
+  dark: {
+    text: '#ECEDEE',
+    background: '#151718',
+    tint: tintColorDark,
+    icon: '#9BA1A6',
+    tabIconDefault: '#9BA1A6',
+    tabIconSelected: tintColorDark,
+  },
+};
+
+export const Fonts = Platform.select({
+  ios: {
+    /** iOS `UIFontDescriptorSystemDesignDefault` */
+    sans: 'system-ui',
+    /** iOS `UIFontDescriptorSystemDesignSerif` */
+    serif: 'ui-serif',
+    /** iOS `UIFontDescriptorSystemDesignRounded` */
+    rounded: 'ui-rounded',
+    /** iOS `UIFontDescriptorSystemDesignMonospaced` */
+    mono: 'ui-monospace',
+  },
+  default: {
+    sans: 'normal',
+    serif: 'serif',
+    rounded: 'normal',
+    mono: 'monospace',
+  },
+  web: {
+    sans: "system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif",
+    serif: "Georgia, 'Times New Roman', serif",
+    rounded: "'SF Pro Rounded', 'Hiragino Maru Gothic ProN', Meiryo, 'MS PGothic', sans-serif",
+    mono: "SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace",
+  },
+});

apps/expo/src/hooks/use-color-scheme.ts

@@ -0,0 +1 @@
+export { useColorScheme } from 'react-native';

apps/expo/src/hooks/use-color-scheme.web.ts

@@ -0,0 +1,21 @@
+import { useEffect, useState } from 'react';
+import { useColorScheme as useRNColorScheme } from 'react-native';
+
+/**
+ * To support static rendering, this value needs to be re-calculated on the client side for web
+ */
+export function useColorScheme() {
+  const [hasHydrated, setHasHydrated] = useState(false);
+
+  useEffect(() => {
+    setHasHydrated(true);
+  }, []);
+
+  const colorScheme = useRNColorScheme();
+
+  if (hasHydrated) {
+    return colorScheme;
+  }
+
+  return 'light';
+}

apps/expo/src/hooks/use-theme-color.ts

@@ -0,0 +1,21 @@
+/**
+ * Learn more about light and dark modes:
+ * https://docs.expo.dev/guides/color-schemes/
+ */
+
+import { Colors } from '@/constants/theme';
+import { useColorScheme } from '@/hooks/use-color-scheme';
+
+export function useThemeColor(
+  props: { light?: string; dark?: string },
+  colorName: keyof typeof Colors.light & keyof typeof Colors.dark
+) {
+  const theme = useColorScheme() ?? 'light';
+  const colorFromProps = props[theme];
+
+  if (colorFromProps) {
+    return colorFromProps;
+  } else {
+    return Colors[theme][colorName];
+  }
+}

apps/expo/tsconfig.json

@@ -0,0 +1,16 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "strict": true,
+    "baseUrl": ".",
+    "paths": {
+      "@/*": ["./src/*"]
+    }
+  },
+  "include": [
+    "**/*.ts",
+    "**/*.tsx",
+    ".expo/types/**/*.ts",
+    "expo-env.d.ts"
+  ]
+}