Can anyone recommend a good one?
I’d like one that can kinda “save” my progress not only locally. Maybe an app account or something that integrates with a cloud service?
I had an ancient one very early in my smartphone days, but as I lost/had my phone stolen I would lose all my progress and miss the pages of the books I was reading.
It may be a little hard to find a FOSS app with a cloud backup, I like to track my progress independently through BookWyrm, you may know it, it would be the federated version of Goodreads.
Librera is the ol’ reliable in terms of FOSS document readers, some people may find the UI a little clumsy tho, but it probably is the most feature-rich you will find.
Personally, being a minimalist myself I like the simpler Book Reader. Search, index menu, dark mode and page persistence, it has all I need, nothing more, nothing less :)