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.