Preview

Your app previews live as you build:

• App, Website, and most Fullstack apps — preview instantly, right in your browser tab.
• The most demanding Fullstack apps — take a few seconds to start up, since they run in a full server environment rather than your browser.
• Mobile apps — preview in a web player, or scan a QR code to open the app on your own phone using the free Expo Go app.

A viewport/device-size toggle is available in the preview panel for checking how your app looks at different screen sizes.