Creating a react native app is easy. The conversion from an existing native app to react-native does require some tweaks but is possible. However, React Native gets updated every month, so you need to be cautious about it otherwise it might require major changes later. We have illustrated the simple idea that the creation and conversion of a native Android or an iOS app to react native can be done, but we have not covered the tools, development setup, native modules and native UI components that are to be used in the process here. Go ahead with it and let us know your queries on it!