React Native is an open-source framework created by Meta (Facebook) that lets you build native mobile apps for iOS and Android using JavaScript. Since its release in 2015 it has become one of the most popular cross-platform development tools in the world.
What Is React Native?
React Native is the React library adapted for mobile platforms. If you have web development experience, learning React Native is fairly easy. With a single codebase you can build both an iOS and an Android app.
How React Native Works
React Native renders your JavaScript components as real native UI components. Unlike hybrid apps that run inside a web view, this gives you genuine native performance. Historically, JavaScript talked to native modules through the "bridge"; the New Architecture (JSI, Fabric and TurboModules, enabled by default in recent versions) replaces it with a faster, direct interface for accessing platform-specific features.
Advantages of React Native
1. Single Codebase
The biggest advantage is building both iOS and Android apps from one codebase. This significantly reduces development time and cost; 80–90% of the code can be shared across platforms.
2. The JavaScript Ecosystem
JavaScript is one of the most popular programming languages in the world. There is a large developer community, a rich library ecosystem and plenty of learning resources. If you know React, moving to React Native is easy.
3. Hot Reloading
Hot reloading (now called Fast Refresh) lets you see code changes instantly. You can test changes without rebuilding the app, which greatly speeds up development.
4. Native Performance
React Native uses native components, so it offers an experience as smooth as native apps. Animations and user interactions are optimised for each platform.
5. Broad Community Support
There is a large open-source community, thousands of ready-made libraries and components, and active forums and support channels. You can find existing solutions for most of the problems you run into.
6. Cost Efficiency
One team can develop for two platforms, and maintenance and update costs drop as well. It is an ideal solution for small businesses and startups.
Disadvantages of React Native
1. Performance Limitations
In some cases the JavaScript layer can become a performance bottleneck; the New Architecture reduces this, but it does not remove it entirely. For compute-heavy apps or very complex animations, native development may be a better fit.
2. Dependence on Native Modules
For platform-specific features you may need to write native modules or rely on third-party libraries, which can sometimes cause compatibility problems.
3. Upgrade Challenges
React Native is updated constantly, and these updates can include breaking changes. Keeping your project current can take extra effort.
4. Larger App Size
React Native apps usually have a larger file size than fully native apps, because the JavaScript engine and framework code take up extra space.
The React Native Development Process
1. Setting Up the Development Environment
To get started with React Native you need the following tools:
- Node.js: The JavaScript runtime
- npm or Yarn: Package manager
- React Native CLI or Expo: Project scaffolding tool
- Xcode: For iOS development (requires macOS)
- Android Studio: For Android development
2. Expo vs React Native CLI
Expo
Ideal for beginners, Expo is excellent for fast prototyping and straightforward projects:
- Easy setup and quick start
- Ready-made components and APIs
- OTA (over-the-air) updates
- More limited direct access to native code
React Native CLI
The React Native CLI is preferred when you need full control and access to native modules:
- Full access to native code
- Custom native modules
- More configuration flexibility
- More complex setup
3. Core Components
The basic building blocks of React Native:
- View: The basic container component (similar to a div)
- Text: Displays text
- Image: Loads images
- ScrollView: A scrollable area
- FlatList: High-performance lists
- TouchableOpacity: Tappable elements
- TextInput: Text input
4. Styling and Design
Styling in React Native is similar to CSS but defined with JavaScript objects. The Flexbox layout system is supported, which is ideal for responsive design.
5. Navigation
React Navigation is the most popular navigation library and supports:
- Stack navigation (screen stacks)
- Tab navigation (tab bars)
- Drawer navigation (side menu)
- Deep linking
6. State Management
There are several options for managing app state:
- useState and useContext: Simple state management
- Redux: For complex apps
- MobX: Reactive state management
- Zustand: A lightweight, simple solution
Major Companies Using React Native
React Native is used by many large companies:
- Facebook: Ads Manager, Marketplace
- Instagram: Parts of the app, such as profile editing and notification screens
- Airbnb: (later moved back to native)
- Uber Eats: Restaurant dashboard
- Discord: Mobile app
- Pinterest: Mobile app
- Shopify: Mobile apps
Tips for React Native Projects
Performance Optimisation
- Use FlatList instead of ScrollView for long lists
- Prevent unnecessary renders with useMemo and useCallback
- Optimise image sizes
- Enable the Hermes JavaScript engine (the default in current versions)
Code Quality
- Use TypeScript
- Configure ESLint and Prettier
- Write unit tests (Jest)
- Run end-to-end tests (Detox)
React Native Development with Enextware
At Enextware we build high-quality iOS and Android apps with React Native. Our team follows modern architecture and best practices to deliver scalable, maintainable solutions. We describe the scope of our service on the mobile app development page.
If you would like a free consultation for your React Native project, contact us.
Frequently Asked Questions
React Native or Flutter?
Both are mature, powerful options. If your team knows JavaScript/React or you want to share code with the web, React Native stands out; if a pixel-identical interface on every platform and heavy animation are the priority, Flutter does. We compare them in detail in our guide to Flutter app development.
Can React Native apps be published on the App Store and Google Play?
Yes. React Native produces real native app packages (IPA for iOS, AAB for Android), and they go through the same store review as any other native app. For the user there is no difference.
Can I reuse the code of my existing React website?
Partly. Business logic, the API layer, TypeScript types and state management code can be shared. UI components cannot, because React Native uses native components such as View and Text instead of the web's div and span.
How long does a React Native app take to build, and on what budget?
Timeline and budget depend on the number of screens, backend needs and integrations such as payments and maps. To scope the first version correctly, see our MVP mobile app guide; for the cost items, see our article on mobile app pricing.
Conclusion
With fast development, cost efficiency and broad community support, React Native is an excellent choice for mobile app development. If you know JavaScript and React, the learning curve is low, and in the right use cases you can achieve performance close to native development.
