DigiTransit-v2

Expo Router app for nearby public transit discovery with native Google Maps support and a Mapbox-backed web map.

Get started

1. Install dependencies

   pnpm install

2. Configure DigiTransit API access

   cp .env.example .env

   Then set EXPO_PUBLIC_DIGITRANSIT_API_KEY in .env. Register for an API key at https://portal-api.digitransit.fi. If you want Android Google Maps tiles in a development build, also set EXPO_PUBLIC_ANDROID_GOOGLE_MAPS_API_KEY in .env. If you want Google Maps-backed native dark map parity on iOS, also set EXPO_PUBLIC_IOS_GOOGLE_MAPS_API_KEY. If you want the live web map instead of the local fallback surface, set EXPO_PUBLIC_MAPBOX_PUBLIC_TOKEN. You can optionally override the GraphQL endpoint with EXPO_PUBLIC_DIGITRANSIT_API_URL.

   For standalone EAS builds, set the same public variables in the EAS environment used by the build profile. The preview profile expects the EAS environment named preview.

   Local standalone APKs are written to artifacts/android/digitransit-preview.apk by default. You can override the path with ANDROID_STANDALONE_OUTPUT_PATH=/your/path/app.apk.

   After adding the Google Maps key, rebuild the Android app so the native manifest metadata is regenerated. After adding the iOS Google Maps key, rebuild the iOS app so the config plugin can regenerate native settings.

3. Start the app

   pnpm start

4. Regenerate GraphQL types after editing any .graphql document

   pnpm codegen

In the output, you'll find options to open the app in a

• development build
• Android emulator
• iOS simulator
• Expo Go, a limited sandbox for trying out app development with Expo

You can start developing by editing files under src/. Route entry points live in src/app, feature code in src/features, and platform adapters in src/core/platform.

Quality checks

Run all checks at once:

pnpm check

Individual checks:

Command	Purpose
pnpm lint	ESLint
pnpm typecheck	TypeScript type checking
pnpm format:check	Prettier formatting validation
pnpm test	Jest unit/integration tests
pnpm test:ci	Full test suite (CI mode)
pnpm codegen	Regenerate GraphQL types

Learn more

To learn more about developing your project with Expo, look at the following resources:

• Expo documentation: Learn fundamentals, or go into advanced topics with our guides.
• Learn Expo tutorial: Follow a step-by-step tutorial where you'll create a project that runs on Android, iOS, and the web.

Join the community

Join our community of developers creating universal apps.

• Expo on GitHub: View our open source platform and contribute.
• Discord community: Chat with Expo users and ask questions.