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KOReader vs ProseReader: catalog facts
KOReader	ProseReader
Free Free and open source under the AGPL 3.0.	Free Free and open source under the GPL-3.0.
Linux, Android	Android
Runs on Kindle, Kobo, PocketBook, Cervantes and reMarkable hardware Opens PDF, DjVu, CBZ, EPUB, FB2, Mobi, DOC, RTF, HTML, CHM and TXT	Actively developed with frequent releases Available on F-Droid
Installing on a locked e-reader means jailbreaking it first, at your own risk The settings menus are deep and not self-explanatory	Focused on EPUB files Small user base and community
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0	License: GPL-3.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.