User Interface Question

In the tutorial videos, it appears the developer is working inside of an app, and the preview on the right side looks like a phone.

How do I get to that user interface? When I preview from Chrome, all I get is another browser window.


What you see in the video is just me streaming the iPhone on my desk onto my Mac with an app called Reflector (, which enables you to receive Apple AirPlay connections – so the actual Preview app is still running on the phone.

Ah, ok, thanks. That’s pretty cool, I need to check if anything similar exists for Android (Pixel).

Reflector supports Android too, see e.g.