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Quire vs Calibre-Web Companion: catalog facts
Quire	Calibre-Web Companion
Free Free and open source under the Apache-2.0 license.	Free Free and open source under the GPL-3.0.
Android, Self-hosted	Android
Browses calibre-web libraries over OPDS Reading progress syncs to a server you run yourself	Native mobile interface for Calibre-Web Supports Calibre-Web Automated
Requires a calibre-web setup to be useful Young project with a small user base	Requires your own Calibre-Web server Unofficial, not made by the Calibre-Web developers
Downloadable app, Self-hosted	Downloadable app
Open source	Open source
License: Apache-2.0	License: GPL-3.0
Not stated if an account is needed	Account needed
Not stated if it 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.