UWB and Nearby Interaction: iPhone Pro Max 15 and Apple Watch 9

Hi all,

I've got a question regards UWB and Nearby Interaction direction measuring for iPhone Pro Max 15 (iOS 17.5) and Apple Watch 9 (watchOS 10.5) devices.

I know that direction isn't available for Watch devices. Also, I've recently read that direction isn't available for Pro Max 15 devices, either. Apparently, it only has one UWB antenna.

What's confusing me is that the Watch's 'find my iPhone' app displays direction via a radar-type UI.

So, my question is, how's it doing that? Is it using both devices' magnetometers to work out heading; so, which direction I need to face as I move? Is it some kind of Bluetooth trickery? Or, have I missed something very obvious?

I'd really like to use this kind of direction measuring in my own apps. Any ideas would be much appreciated.

UWB and Nearby Interaction: iPhone Pro Max 15 and Apple Watch 9
 
 
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