What is React Native and why it is used?

React Native is an open-source JavaScript framework, designed for building apps on multiple platforms like iOS, Android, and also web applications , utilizing the very same code base. It is based on React, and it brings all its glory to mobile app development.

While Reactjs is basically a JavaScript library and React Native is the entire framework, the former is the heart of the latter , and compliments each other. If Reactjs is optimal for creating apps with high functionality and complex calculations, then React Native is ideal to give a native feeling to your mobile apps.

Summary. React Native is a mobile app development platform developed by Facebook for its internal app development. It was open sourced in March 2015 for iOS mobile app development.