What is React Native Development? Complete Guide 2026
React Native is a framework for building mobile apps with JavaScript and React. One codebase powers both iOS and Android. This guide explains what it is, how it works, and when to choose it.
What is React Native?
React Native is an open-source framework by Meta (Facebook) that lets you build native-feeling mobile apps using JavaScript and React. Instead of writing separate iOS (Swift) and Android (Kotlin) apps, you write one codebase that runs on both platforms.
Key point
React Native compiles to native components. Your app uses real iOS and Android UI elements—not a web view. That means performance close to fully native apps.
How React Native Works
You write components in React (JSX). React Native translates them into native iOS and Android widgets. A JavaScript thread handles logic; the native thread renders the UI. That bridge makes React Native fast and flexible.
Single codebase
Write once, run on iOS and Android. 70-90% code reuse.
Native performance
Uses native components. Smooth animations and fast load times.
Large ecosystem
Huge community, npm packages, and third-party libraries.
When to Choose React Native
React Native suits startups and businesses that need to ship iOS and Android quickly on a single codebase. It works well when your team knows JavaScript/React, when you need access to a large ecosystem, or when you want to iterate fast.
For highly custom graphics or games, native might be better. For most business apps, React Native is a strong choice.
React Native for UK Businesses
UK agencies like KinKo Digital use React Native to deliver mobile apps 30-40% faster than separate native builds. We build for iOS and Android from one codebase, reducing cost and time to market for Lancashire and UK clients.