How do I build an app with App Builder?

App Builder turns a description into a working app with a live preview.

Build an app

1. Click Apps in the sidebar.
2. Under App type, choose Web app or Mobile app.
3. Under What do you want to build?, describe your app. Or pick one under Or start from a template and click Use template.
4. Watch the preview as it builds, then ask for changes in plain words, such as "add a dark mode" or "make the button bigger".

Preview a mobile app on your phone

1. Install the Expo Go app from the App Store or Google Play.
2. Scan the QR code shown in the preview. On iOS, use the Camera app. On Android, scan it inside Expo Go.
3. The app opens on your phone and updates as you build.

The phone preview runs while your workspace is open and may take a moment on first launch.

Get the code

In Your apps, click Download ZIP to download the app's files. This works once a build has finished.

Delete an app

Click Delete app. This permanently deletes the app, its files and its build chat. It can't be undone.

Tips

• Describe the screens and what each one does.
• Ask for one change per message, so it's easy to see what changed.