[dharmab]

The flash could be a white LED.

Apple has some other devices which require another device for setup, so it wouldn't be unusual for them. They could also offer setup at an Apple store.

[astrange]

> Apple has some other devices which require another device for setup, so it wouldn't be unusual for them.

Hmm, I think that'd be pretty difficult because you can't guarantee the camera on another phone is good enough, unless you require everyone to have a phone from the last 1-2 years.

[dharmab]

You could display instructions on the phone and still use the depth camera on the device, which is presumably used for tracking anyway.