Openreads is the best app for keeping track of your books that is free, open source, with no ads and no tracking!
It is a reading list app that will help you organize your library with four lists provided:
- books you finished,
- books you are currently reading,
- books you want to read later,
- books you didn't finish.
You can also use custom tags and filter through them.
Openreads supports adding a book by looking it up in the Open Library database, scanning its barcode or entering the book's details manually.
You can also view come cool statistics!