The preview pane
The row of pills at the top of the preview pane picks what you’re looking at:
The cloud devices are “iPhone 17 Pro - iOS 26” and “Pixel 8 - Android”. You can’t pick another model or OS version.
Your simulator and the agent’s simulator
Each Remote chat has two cloud simulators.- Your simulator is for trying the app yourself. Tap, scroll and type as you would on a phone. Press Start my simulator to open it.
- The agent’s simulator is the device the agent drives when it tests a change. Press Open agent simulator to watch it live. The agent can also save walkthrough recordings of what it tested.
The Preview button
The Preview button in the chat header opens the preview pane and runs whatever your simulator needs next: start it, resume it, install an update, or ask the agent to build the app. It never cancels a build that’s already running.In Local chats on your Mac
In Local chats (Mac), the preview pane can use your Mac’s own iOS Simulator or Android emulator instead of the cloud simulators. See Local chats on your Mac.Previews and credits
Previews don’t draw down credits. That includes the cloud simulators and the native builds behind them. The agent’s work in the chat does use credits. See How credits work.On a real phone
Previews themselves run in the cloud and can’t be installed on a phone. To try your iOS app on an iPhone, publish it to TestFlight; an organization owner or admin connects Apple and publishes. For Android, ask the agent for an APK and install it on the phone. See Testing on a real phone and Download an Android APK.Related
Using the cloud simulators
Controls, card states, idle simulators and logs.
Native builds and packages
What triggers a rebuild and how long it takes.
Testing on a real phone
iPhone through TestFlight, and what isn’t available.
Parked chats and limits
What happens when a chat is idle.