[1] https://f-droid.org/en/packages/org.koreader.launcher.fdroid...
Once your used to it, the controls are a lot better than stock kindle as well imo.
If you want a cross platform option that's pretty good across Android/iOS/Mac/Windows/Linux, Readest[1] Is another great option. It supports syncing a library of ebooks and is licensed under the AGPL[2].
[1]: https://readest.com/
Supposedly it can interface with various sync providers, but I've not tried this myself. The rendering is lovely.
For example, my usage now only ever goes like this:
1- Open Librera. Presented with a scrollable page of all book covers.
2- Scroll down to the epub I'm currently reading. Tap it once.
3- Resumes the book where I left off, with previous view settings. In my case full screen text with zero UI (tap once to hide the UI).
The only options are stripping the DRM from kobo books or piracy, last I checked.
Piracy and stripping DRMs though definitely work.
You can thank me later (in 20 years).
Unfortunately I have had to go proprietary and use readera premium, which works fine for epubs.