Earlier quoted context omitted.
Looking in the Play Store at "Top Paid" seems like a bunch of one-time purchases listed. I think a lot of it may be a difference between Android and iOS - Apple software seems to have a lot more subscriptions, but that's just an anecdata 'feel'.
My 100% subscriptions in the past years is on Android, actually. What I've heard is that one-time purchases lead to a lack of income after three years, when people expect upgrades. That's not a problem for app developers who don't plan to do any upgrades, of course.
Notably I'll throw in a few things like PocketCasts, Nova Launcher, Gentle Alarm by Mobitobi, a variety of camera and gallery apps. Some of those shifted to subscriptions (PocketCasts after being sold twice), others just got shuttered.