How to install:
1. Tap Download APK above
2. Open the downloaded file
3. If prompted, enable "Install from unknown sources" in Settings
4. Tap Install → Open

iOS app is under development.
For now, test on iPhone using Expo Go:
1. Install Expo Go from the App Store (free)
2. Scan the QR code from the Expo dev server
3. Run the full native app on your iPhone