Phone stands exist, and I can see a custom stand working plausibly well if this made phones replace actual theramins for performances.
Phone stands exist!?
We were talking about an app hence my comment on usability. Now we’re discussing something entirely different.
Exactly, just 3D print a little inverted π-shaped stand, plonk the Cameramin on it, and get on with the performance.
Sounds like a great app idea, no matter that someone else might’ve already done something similar. I’d love to see it personally (although I have my own theremin to play with) .. an app like this would be very fun indeed.