I will admit that paying like $15 four years ago for Stardew Valley on iOS felt a bit weird, but $15 is pretty cheap considering that it's the full game. It doesn't make you buy gems every twenty minutes, or watch an ad every time you plant six crops, or spam your friend to share your status for some extra gold.

It's a full game, and you pay a nominally-high-but-ultimately-reasonable price for it.

Similarly, The Binding of Isaac is also a pretty good iOS game. I don't remember how much I paid, but it was slightly higher than average, but it doesn't spam me with any microtransaction crap.