So you can't sideload apps on iOS, installing your own apps in dev mode is unnecessarily hard and restricted, and you can't release an app in the app store that is not open to the general public? So if I want to build an app just for my family, what do I do?
I think the answer is to use TestFlight? So you can provide a link to your family that will let them install the test version of the app. Unfortunately it does expire after some time, IIRC