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Readest vs Librera Reader: catalog facts
Readest	Librera Reader
Freemium The app is free and open source under the AGPL. The optional cloud sync service has paid…	Free Free to download.
Windows, macOS, Linux, Android, Web, iOS	Android
Reads EPUB, PDF, MOBI, AZW3, FB2, CBZ, TXT and Markdown in one app The same reader on macOS, Windows, Linux, Android, iOS and the web	Wide format support including DjVu and comics Auto-scan of book folders with reading progress
Cloud sync is a hosted service with paid tiers, not purely local A young project, so features and stability are still moving	Android only Many settings can take time to learn
Downloadable app, Web application	Downloadable app
Open source	Open source
License: AGPL-3.0	License: GPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

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