Flutter and React Native are both used to develop the native hybrid app from a single codebase. These apps can run on iOS and Android platforms.
React Native develop by Facebook, whereas Flutter framework first introduced by Google. So, both framework has a very good feature and community.
Flutter uses Dart language to create applications, whereas React Native uses JavaScript to build the applications.
From the developer’s point of view, it is very difficult to choose amongst them. Thus, it is very challenging to choose a winner between Flutter and React Native.