Expo vs React Native CLI: Key Differences and When to Use Each

The Expo framework offers an easy setup with many built-in features and no native code needed, ideal for beginners and fast prototyping. The React Native CLI provides full control over native code and customization, suited for complex apps requiring native modules or custom native code.

Quick Comparison

Here is a quick side-by-side comparison of Expo and React Native CLI based on key factors.

Factor	Expo	React Native CLI
Setup Complexity	Very easy, minimal config	Requires native environment setup (Xcode, Android Studio)
Native Code Access	Limited, mostly no native code	Full access to native code and modules
Development Speed	Fast with hot reload and managed workflow	Slower setup, but flexible
Over-the-Air Updates	Built-in support	Needs custom setup
App Size	Larger due to bundled libraries	Smaller, optimized builds
Customization	Limited to Expo SDK	Unlimited native customization

Key Differences

Expo is a framework and platform that simplifies React Native development by providing a managed workflow with many pre-built native features like camera, location, and push notifications. It requires no native code knowledge and lets you build and deploy apps quickly. However, it limits access to custom native modules and native code changes.

On the other hand, React Native CLI is the official React Native tool that gives you full control over the native iOS and Android projects. You can add any native code or third-party native libraries, making it ideal for complex apps. But it requires setting up native development environments and more configuration.

In summary, Expo is best for beginners, prototypes, and apps that fit within its SDK, while React Native CLI suits advanced developers needing full native customization and control.

Code Comparison

Here is a simple example showing how to create a button that shows an alert when pressed using Expo.

javascript

import React from 'react';
import { Button, Alert, View } from 'react-native';

export default function App() {
  return (
    <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}>
      <Button
        title="Press me"
        onPress={() => Alert.alert('Hello from Expo!')}
      />
    </View>
  );
}

Output

A screen with a centered button labeled 'Press me'. Pressing it shows an alert saying 'Hello from Expo!'

React Native CLI Equivalent

The same button and alert can be created using React Native CLI with identical React Native code, but you manage native projects yourself.

javascript

import React from 'react';
import { Button, Alert, View } from 'react-native';

export default function App() {
  return (
    <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}>
      <Button
        title="Press me"
        onPress={() => Alert.alert('Hello from React Native CLI!')}
      />
    </View>
  );
}

Output

A screen with a centered button labeled 'Press me'. Pressing it shows an alert saying 'Hello from React Native CLI!'

When to Use Which

Choose Expo when you want a fast, easy setup without native code, ideal for beginners, prototypes, or apps that use standard device features.

Choose React Native CLI when you need full native code access, want to add custom native modules, or build complex apps requiring deep customization.

Expo can speed up development but may limit flexibility, while React Native CLI requires more setup but offers complete control.

Key Takeaways

Expo offers quick setup and many built-in features but limits native code access.

React Native CLI requires more setup but allows full native customization.

Use Expo for simple apps and prototypes, React Native CLI for complex, custom native apps.

Expo includes easy over-the-air updates; React Native CLI needs manual setup for that.

App size tends to be larger with Expo due to bundled libraries.