Run React Native App on a Specific Device or Simulator

Android

Run on the default device or emulator:

npx react-native run-android

Run on a specific emulator or device:

npx react-native run-android --deviceId emulator-5554

npx react-native run-android --deviceId R58M123ABC

iOS

Run on the default simulator:

npx react-native run-ios

Run on a specific simulator:

npx react-native run-ios --simulator="iPhone 16"

Run on a simulator or physical device by UDID:

npx react-native run-ios --udid YOUR_UDID

Tips

Get connected Android device and emulator IDs:

adb devices

Get connected iOS device and simulator UDIDs:

xcrun xctrace list devices

If you use a custom script like yarn ios, add -- before the flags:

yarn ios -- --simulator="iPhone 16"
yarn ios -- --udid YOUR_UDID
yarn android -- --deviceId emulator-5554