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Clapper vs Showtime: catalog facts
Clapper	Showtime
Free Free and open source under GPL and LGPL licences.	Free Free and open source as part of GNOME.
Linux	Linux
Native GTK4 interface that fits GNOME GStreamer-based playback	Minimal interface with controls that fade out during playback Subtitle and audio track selection, and playback speed control
Aimed at Linux and the GNOME desktop Format support depends on installed GStreamer plugins	Linux only Deliberately few advanced options compared with larger players
Downloadable app	Downloadable app
Open source	Open source
License: GPL and LGPL	License: GPL-3.0
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 September 23, 2026

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