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Openshelf vs Inventaire: catalog facts
Openshelf	Inventaire
Free Free and open source under the GPL-3.0 licence.	Free Free to use and open source under the AGPL-3.0 licence.
Android	Web, Self-hosted
No account and data stays on the device Flexible organisation by category, collection and imprint	Book data from ISBNs and Wikidata Share a library with friends and communities
Android is the supported platform No cloud sync between devices	Focused on books only Covers physical books rather than ebook files
Downloadable app	Web application, Self-hosted
Open source	Open source
License: GPL-3.0-only	License: AGPL-3.0
No account needed	Not stated if an account is 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 October 2, 2026

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