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Clapper vs Cine: catalog facts
Clapper	Cine
Free Free and open source under GPL and LGPL licences.	Free Free and open source under the GPL-3.0.
Linux	Linux
Native GTK4 interface that fits GNOME GStreamer-based playback	MPV engine for broad format support Minimal, clean interface
Aimed at Linux and the GNOME desktop Format support depends on installed GStreamer plugins	Linux only Fewer advanced options than plain MPV
Downloadable app	Downloadable app
Open source	Open source
License: GPL and LGPL	License: GPL-3.0-or-later
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

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