The time of $1.99 quantum splitters, $0.99 iBeer, and $1.99 Lightsaber apps is long gone. Most of those apps didn't really do anything all that amazing, but looking back on it I think I miss when app stores were flush with "we could use the hardware to do this" rather than "we could get in-app purchases and subscriptions like this"
Not that there wasn't monetization as a goal back then, but just that there was a lot of weird paradigms being experimented on where we now have a solidly 10-year norm instead.