What Is React Native

React Native is a tool that lets you build mobile apps using JavaScript.

Instead of writing separate code for iOS and Android, you can use one codebase that works on both platforms. This makes development faster and easier to manage.

React Native is based on React, a popular library for building user interfaces. It uses the same core ideas:

• Components: reusable pieces of UI;
• State: data that can change over time.

This means if you know React, learning React Native becomes much easier.

There is one important thing to understand.

Apps built with React Native are real mobile apps. They are not websites inside a browser. They run on the device and use native components under the hood, so they behave like normal apps you install from the App Store or Google Play.

So instead of building everything twice, you can write your app once using JavaScript and React, and run it on both platforms.