Once you've set these up, you can launch your app on an Android Virtual Device by running npm run android, or on the iOS Simulator by running npm run ios (macOS only). If you want to run your app on the iOS Simulator or an Android Virtual Device, please refer to the instructions for 'React Native CLI Quickstart' to learn how to install Xcode or set up your Android development environment. Running your app on a simulator or virtual deviceĮxpo Go allows you to run your React Native app on a physical device without installing iOS and Android native SDKs. If you're curious to learn more about React Native, check out the Introduction to React Native.

If you have a problem with Expo, before creating a new issue, please see if there's an existing issue about it in the Expo issues. You can also ask for help on the Expo Discord. Now what?Įxpo also has docs you can reference if you have questions specific to the tool. That's it!Ĭongratulations! You've successfully run and modified your first React Native app. The application should reload automatically once you save your changes. Open App.js in your text editor of choice and edit some lines. Now that you have successfully run the app, let's modify it. On iOS, use the built-in QR code scanner of the default iOS Camera app. On Android, use the Expo Go app to scan the QR code from your terminal to open your project. Install the Expo Go app on your iOS or Android phone and connect to the same wireless network as your computer. This will start a development server for you.

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