“FYI: No aperture settings on any iPhone – fixed aperture lenses without teensy diaphragms.”
Rex. Yes but the high end iPhones have multiple fixed aperature lenses. I have not used one but according to the documentation, the camera software allows you to change the aperture, control depth of field, presumably by compositing images with the in-camera software.
Exposure. Since I use ProCamera, I do not really use the Apple camera app but the app has an exposure compensation slider that opens when you touch the screen. But AFAIK you cannot set a 1 sec of 1/100 sec exposure like you can with ProCamera. I have never owned a high end iPhone so I would expect the Apple app supports a few more features on the more expensive phones.
The other feature I like with ProCamera is that you can separate the focus point from the exposure point just by moving sliders on the screen.