Another useful feature would be to import ebooks in EPUB format to read them with the reader, and create flashcards from it.
Yeah that’d definitely be useful, but sadly most popular ebook formats have DRM in it that prevent text extraction. So for legal reasons I would not really be able to add this feature.
If you wish to go that route, you could use a tool like Calibre, extract the text and paste it into Kitsun. After setting up a flow like that once you’d be done within a minute