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Bookaccio vs Openshelf: catalog facts
Bookaccio	Openshelf
Free Free and open source under the GPL-3.0.	Free Free and open source under the GPL-3.0 licence.
Android	Android
Book search through the Google Books API Reading progress tracking	No account and data stays on the device Flexible organisation by category, collection and imprint
Book search depends on the Google Books API Android only	Android is the supported platform No cloud sync between devices
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: GPL-3.0-only
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 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.