This is an important point OP should consider. While I defend his position and right to choose the pricing model that makes the most sense for him as a dev, and I personally don’t think $20/yr is very much if it solves a pain point, this is a valid POV to keep in mind that he may actually be leaving money on the table going an all subscription route. It sounds like he is also being limited by the kinds of pricing models the App Store supports (i.e. only subscriptions)