Expo App Design

Complete guide for building beautiful apps with Expo Router. Based on official Expo skills from expo/skills repository.

Running the App

CRITICAL: Always try Expo Go first before creating custom builds.

Most Expo apps work in Expo Go without any custom native code. Before running npx expo run:ios or npx expo run:android:

1. Start with Expo Go: Run npx expo start and scan the QR code with Expo Go
2. Check if features work: Test your app thoroughly in Expo Go
3. Only create custom builds when required

When Custom Builds Are Required

You need npx expo run:ios/android or eas build ONLY when using: