Photomator has a pay once option. Too Good To Go is literally free with no IAP. That's just from the apps that I know about from the list, not sure about any others that aren't subscription based or offer a pay-once option.

I wouldn't even mind it if they were more affordable, but asking me to pay €60 for a weather app or €120 or whatever for Ynab is ridiculous. I usually only start yearly subscriptions around the start of the year, for budget reasons, but that would easily add up.

I wouldn't mind paying for some apps if they offered monthly subscriptions at the same price as a yearly subscription. I get that the whole point of yearly subscriptions is to lock people in, but they usually only offer a weekly trial, which isn't enough to see if I'll use the app enough to be worth its money.

Lies of P is pay-once.

AllTrails is a funny one. It's founded largely on the crowdsourced notes from their community. But I wouldn't be surprised, even expect, that the developers get 70% of the cut and Apple 30%, none of which have anything to do with this main aspect of the app that is highlighted in the App Store's "featured app" page.

Not one of them is pay-once.

The Lost in Play iPad app looks like a one-time purchase.

A bunch of them just have a one time purchase option and some are even free.