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Openshelf vs Pitak: catalog facts
Openshelf	Pitak
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the GPL 3.0 or later.
Android	Android
No account and data stays on the device Flexible organisation by category, collection and imprint	Works fully offline Lending records kept in an encrypted vault
Android is the supported platform No cloud sync between devices	Very young project with few users Catalogues physical books rather than reading ebooks
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: GPL-3.0-or-later
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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