I use storygraph and love it, but hate the centralization of it. I like bookwyrm, but unfortunately there isn’t really any iOS apps (or any apps) available for it. The mobile site is great and is able to function really well as a PWA iirc but the app issue is my biggest barrier personally right now. It’s a matter of someone who’s willing to make an app at this point.

I will say, I am currently tinkering with bookwyrm and potentially setting up an instance for literature.cafe users (and potentially others in the lemmyverse). It requires a bit of tinkering to get working right now, but we will see.