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Expo integration

Build and deploy React Native mobile apps.

Overview​

Appifex uses Expo for mobile development:

  • Development: Expo Go for instant testing
  • Builds: EAS Build for app store submissions
  • Updates: Over-the-air updates

Testing with Expo Go​

Setup​

  1. Download Expo Go on your device

  2. Generate mobile code in Appifex

  3. Scan the QR code shown after deployment

What you can test​

  • All UI components
  • Navigation
  • API calls
  • Most device features

Limitations in Expo Go​

Some features require a custom build:

  • Push notifications
  • In-app purchases
  • Custom native modules

QR codes​

After mobile deployment:

  1. QR code appears in Appifex
  2. Scan with your phone camera (iOS) or Expo Go (Android)
  3. App opens in Expo Go

Publishing to stores​

Build for production​

Request a build:

"Create production builds for iOS and Android"

iOS (App Store)​

  1. Build generates IPA file
  2. Upload to App Store Connect
  3. Submit for review
  4. Publish to App Store

Android (Play Store)​

  1. Build generates AAB file
  2. Upload to Play Console
  3. Submit for review
  4. Publish to Play Store

Over-the-air updates​

After initial app store submission:

  • Code changes deploy instantly
  • No new app store review needed
  • Users get updates automatically

What can be updated OTA​

  • JavaScript code
  • Assets (images, fonts)
  • Most app logic

What requires new build​

  • Native dependencies
  • App permissions
  • Splash screen/icon

Configuration​

app.json​

Core app configuration:

{
  "expo": {
    "name": "My App",
    "slug": "my-app",
    "version": "1.0.0",
    "ios": {
      "bundleIdentifier": "com.myapp"
    },
    "android": {
      "package": "com.myapp"
    }
  }
}

EAS configuration​

Build settings in eas.json:

{
  "build": {
    "production": {
      "ios": { "simulator": false },
      "android": { "buildType": "apk" }
    }
  }
}

Troubleshooting​

QR code not scanning​

  1. Ensure Expo Go is installed
  2. Check you're on the same network
  3. Try refreshing the QR code

App crashes on launch​

  1. Check Appifex activity log for errors
  2. Look for missing dependencies
  3. Verify API endpoints are accessible

Build failed​

  1. Review build logs in Appifex
  2. Check for native dependency issues
  3. Verify app.json configuration

Best practices​

Test frequently​

Scan QR code after each change to verify.

Use development builds​

For features not in Expo Go, create a development build.

Keep dependencies updated​

Outdated packages can cause build issues.