If you already have a React web app, and consider porting it to a proper phone app, you should consider using React Native. However, you could also use PhoneGap/Cordova, which is done in a heartbeat: How?
tomfa • 2016-07-30
A handful notes from the React intro tutorial (which is available at https://facebook.github.io/react/docs/tutorial.html).
tomfa • 2016-07-04