Android Development :-
Modern tools and resources to help you build experiences that people love, faster and easier, across every Android device.
iOS Development:-
iOS is Apple’s mobile OS that runs on an iPhone, iPad, iPod Touch hardware. Apple provides tools and resources for creating iOS apps and accessories for these devices. As an iOS developer, you can program in native languages such as Swift or Objective-C or build cross-platform native applications using React Native (JavaScript) or Xamarin (C# & F#).
React Native Development:-
React Native combines the best parts of native development with React, a best-in-class JavaScript library for building user interfaces. Use a little—or a lot. You can use React Native today in your existing Android and iOS projects or you can create a whole new app from scratch.