I’ve settled on Memmy (which I think is iOS only). I like that it’s pretty true — maybe 100% true — to the Lemmy web app’s features but with more of a designer’s eye, I guess. Just a lil’ polish. Not trying to be something the backend isn’t ready for.
Memmy is very buggy and crashes a lot. It was a strong contender 2 months ago. But the developer, by his own admission, can’t be arsed to update it in a timely fashion. In the intervening weeks strong contenders for iOS have arisen. I think Lemma is the most promising, although it’s available via TestFlight at the moment.