mobile / react native
How to Learn React Native for Free
Already know React or JavaScript? Ship real native apps for iOS and Android from one codebase. Here's what to know before you start, how to learn it, and the traps that trip up web developers moving to mobile.
React Native is the fastest path to mobile for web developers. It uses React and JavaScript to build native apps with real native UI components (not a web view) for both iOS and Android from a single codebase. It powers apps you use every day, from Instagram to Discord. The huge advantage: if you already know React, you're most of the way there, because it's the same component model, props, state, and hooks you already use. This guide covers what you need before you start, how React Native differs from web React, the free official resources, and the mistakes that catch web developers making the jump to mobile.
01 · BEFORE YOU START
Know React first
React Native is React, so the prerequisite isn't mobile knowledge. It's solid React. If you're comfortable with components, props, state, hooks (useState, useEffect), and JavaScript essentials, you already know the hard part. If React itself is shaky, learn that first; it's the foundation everything here rests on.
The main new idea is that you build UI with native components (<View> and <Text> instead of <div> and <p>) and style with a JavaScript version of CSS via StyleSheet. It's close enough to web React that the transition is quick, and different enough that you should expect a short adjustment.
02 · THE PATH
The order to learn it in
Lean on your React knowledge and add the mobile-specific pieces in order:
1. Set up with Expo
The official docs now recommend Expo, tooling that removes almost all the painful native setup. You can run your app on your own phone in minutes — start here rather than wrestling with Xcode and Android Studio.
2. Core components and styling
Learn the native building blocks (View, Text, Image, ScrollView, lists) and how StyleSheet and Flexbox handle layout. This is where web React and React Native differ most.
3. Navigation and data
Screens and navigation (React Navigation), then calling APIs and storing data. These turn a single screen into a real, multi-screen app.
03 · THE BEST FREE RESOURCES
Where to actually learn it (free)
The official docs are excellent and free — for a React developer, they're often all you need. Use both:
Start here. The React Native get-started guide walks you through your first app, including the modern Expo workflow that makes setup painless. It's the fastest way from zero to an app running on your phone.
The full reference. The complete React Native documentation covers every core component, API, navigation, and the platform-specific details you'll hit when building real apps. Keep it open as your reference alongside the React docs you already know.
04 · AVOID THESE
Common mistakes learning React Native
One trap is learning React Native before React. Build the React foundation first, or you'll struggle with mobile and the framework at once. Another is skipping Expo and fighting native setup on day one, which burns motivation before you've built anything. And some developers fall into assuming web habits transfer directly: there's no div, CSS is JavaScript, and some things behave differently on iOS versus Android.
05 · TRY IT
Build your first app this weekend
React Native clicks the moment your own app runs on your actual phone.
FlatList of items, a TextInput to add tasks, and a button to remove them, styled with StyleSheet. Run it on your phone by scanning the QR code. You'll practice core components, styling, and state, and seeing your app on a real device is the moment it feels real.06 · FAQ
Frequently asked questions
Do I need to know React before React Native?
Yes. React Native uses the same component model, props, state, and hooks as React, so solid React is the main prerequisite. If you already know React, you know most of what you need, and the mobile-specific parts are quick to pick up.
Should I learn React Native or Flutter?
Learn React Native if you already know React and JavaScript, since it builds directly on that knowledge. Learn Flutter if you want top performance and a consistent look and don't have a React background. Both are strong cross-platform choices.
What is Expo in React Native?
Expo is a set of tools and services that removes most of the painful native setup, letting you build and run React Native apps quickly, including previewing on your own phone. The official docs now recommend it as the easiest way to start.
Do I need a Mac for React Native?
You can develop and test Android apps on any operating system, and Expo lets you preview on a real phone regardless. However, building and publishing the iOS version to the App Store still requires a Mac with Xcode.
Is React Native still worth learning in 2026?
Yes. React Native remains widely used by major companies, is actively maintained, and lets web developers move into mobile with minimal new learning. Demand stays strong and all the official tooling and docs are free.