Compare software

Flow vs Readest: catalog facts
Flow	Readest
Free Free and open source; self-hosting costs only your own server.	Freemium The app is free and open source under the AGPL. The optional cloud sync service has paid…
Web, Self-hosted	Windows, macOS, Linux, Android, Web, iOS
Reads EPUB files directly in the browser Docker and docker-compose files for self-hosting	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
Focused on EPUB rather than a wide range of formats Self-hosting requires running a server	Cloud sync is a hosted service with paid tiers, not purely local A young project, so features and stability are still moving
Web application, Self-hosted	Downloadable app, Web application
Open source	Open source
License not stated	License: AGPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 21, 2026

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