Coming from DSLRs, most have the options of M, A, S or P. I usually prefer Manual shooting, but it is a bit elaborate on the iPhone. I think. Aperture priority would be really useful, but I do not know if access to aperture setting is available on the iPhone (can’t see it in the natove photo app).
Would you be able to implement A?
You are correct. iPhone have fixed aperture lenses, there is no way for us to control it. That being said, we are working on aperture simulation in software 😊