Workspace
Preview and devices
Live preview with device frames, instant snapshots on open, annotations, comments, and running on your phone.
The Preview tab shows your app running live, updating as the agent (or you) change code. Switch between a full browser view and phone or tablet frames to check every size, and use the toolbar to reload, change devices, or toggle the canvas.
Instant snapshots
Opening a project shows your app instantly: Startbase keeps a snapshot from the last agent run and displays it (with a "Snapshot" chip) while the live development environment starts in the background. The live preview takes over automatically, usually within seconds. During a brand-new project's first build, the preview shows build progress instead of an empty template.
Draw, annotate, and comment
- Draw on the preview to mark exactly what you mean, then send the annotated screenshot to chat.
- Pin comments to specific spots in the UI to leave feedback for yourself or teammates.
- The test panel helps you poke at the running app while inspecting behavior.
Running mobile apps on your phone
Expo projects preview inside a device frame in the workspace, and you can also run them on a real phone: scan the QR code from the preview with the Expo Go app (iOS and Android) and your app opens on the device, live-reloading as you build.
Sharing the preview
The Share button gives teammates (or anyone, if you flip the toggle) a read-only link to the running preview. See Sharing previews under Publishing for details.