Ever since Readarr was officially discontinued, many forks and replacements have popped up. I’m currently running pennydreadful/bookshelf, which seems to be chugging along. Faustvii/Readarr is also around but seems to not be actively meaintained??
There’s also Chaptarr, which looks promising, but I’ve heard concerns about it being vibe-coded and such (see rreading-glasses: “I do not endorse the vibe-coded Chaptarr project.”). Does anybody know to what extent this is true, and what the code quality is like?
Caliber web isn’t two separate applications, it’s a calibre-compatible database served via http. There is no desktop “calibre” involved.
There is integrated koreader sync, though.