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Openshelf vs Alfa Ebooks Manager: catalog facts
Openshelf	Alfa Ebooks Manager
Free Free and open source under the GPL-3.0 licence.	Freemium Free download, with paid editions available to buy.
Android	Windows
No account and data stays on the device Flexible organisation by category, collection and imprint	Catalogs ebooks, paper books and audiobooks together Fetches book details from online sources
Android is the supported platform No cloud sync between devices	Windows only Full features require a purchase
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0-only	License not stated
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 24, 2026

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