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Cinema vs Clapper: catalog facts
Cinema	Clapper
Free Free and open source under the GPL-3.0; donations accepted.	Free Free and open source under GPL and LGPL licences.
Linux	Linux
Thumbnail previews on the seek bar Resumes the last video played	Native GTK4 interface that fits GNOME GStreamer-based playback
Linux only Fewer features than general-purpose players such as VLC or mpv	Aimed at Linux and the GNOME desktop Format support depends on installed GStreamer plugins
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL and LGPL
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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