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GCstar vs BiblioteQ: catalog facts
GCstar	BiblioteQ
Free Free and open source under the GPL-2.0-or-later licence.	Free Free and open source under a BSD licence.
Windows, macOS, Linux	Windows, macOS, Linux, Android
Many built-in collection types plus custom models Plugins fetch item details from the web	Catalogs many media types, from books to video games Works with PostgreSQL for shared use or SQLite for a single file
GTK and Perl interface looks dated on Windows and macOS	Very many options, which takes time to learn Interface is functional rather than polished
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-or-later	License: BSD-3-Clause
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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