bookshelf looks like something you'd like. It doesn't seem to automatically index the files, but it does work without Calibre and has no UI. It only supports Epub though.
I don't know if it saves progress and I can't test it right now.
I'm not aware that progress saving is a default feature of OPDS. There is some work being done in that direction, but I don't know of any server/app combinations that do that for ebooks.
Apart from that, I'm relatively happy with kavita. It comes with a web UI though.
bookshelf looks like something you'd like. It doesn't seem to automatically index the files, but it does work without Calibre and has no UI. It only supports Epub though.
I don't know if it saves progress and I can't test it right now.
It actually has a ui. But it looks minimal enough. I'll try it.
can you tell me your testing with bookshelf? really curious with the ui and your opinion on it.
It doesn't support OPDS-PSE, which is the most common way of tracking progress.
https://www.stumpapp.dev/
I'm not aware that progress saving is a default feature of OPDS. There is some work being done in that direction, but I don't know of any server/app combinations that do that for ebooks. Apart from that, I'm relatively happy with kavita. It comes with a web UI though.
Kavita, same as Komga requires too much RAM.
Komga can track ebook reading progress, by converting them to images.
That sounds like a super inconvenient way of doing it