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KMPlayer vs SMPlayer: catalog facts
KMPlayer	SMPlayer
Free Free to download and use.	Free Free and open source under the GPL 2.0.
Windows, macOS	Windows, macOS, Linux
Built-in codecs for most formats Plays 4K and 3D video	Remembers position, audio track and subtitles per file mpv and MPlayer engines, so format coverage is excellent
Closed source Little detail available from the official site about current features	The interface is dated Qt and skins only go so far Two engines means two sets of quirks when something misbehaves
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
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 21, 2026

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