Which version does React Native support (iOS and Android)?

The supported iOS version changes all the time, but you can find it at any time by checking the Podfile on the official repository:

https://github.com/facebook/react-native/blob/main/template/ios/Podfile

For example, as of December 2021, the supported iOS version is 11.0.

You can run it on minSdk 21 as it is documented on the framework's github page.

React Native apps may target iOS 11.0 and Android 5.0 (API 21) or newer.

• for February 2020:
• React Native apps may target iOS 10.0 and Android 4.1 (API 16) or newer.
• Expo supports Android 5+ and iOS 10+.