NDICam

In portrait mode, some of options you can’t click on. Before I bought this, I wasn’t sure if it would use the wide angle lens, as the app just says it supports multiple lenses. Well, good news, it does support all 3 cameras on the iPhone 12 Pro that I have. I do think a really cool feature would be if you could simultaneously stream all 3 of those camera angles at a time, even 2 would be cool. For a live broadcast, 1 camera would turn into 2! Anyhow, if you use this app just remember that certain notifications will stop your stream (like a low battery warning), so test/plan accordingly for all possible scenarios and turn off cellular data to prevent a phone call etc.

It's (currently) half the price of the app that everyone is telling OBS users to get if they want to use their iPhone as a webcam in OBS! The same plug-in works for this app as well. Just a little heads up. As for the actual app, I presume it is very similar to the other NDI app I mentioned. It is very network heavy and that can really increase the number of frames dropped. I did turn off the audio feed and the video improved quite a bit. If your 5GHz WiFi signal is strong on your computer and your phone, the video quality can be really good. I wouldn't say "crystal clear," but I was impressed, at least after I got the wifi sorted out.^^