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PYM Player vs Optimus Player: catalog facts
PYM Player	Optimus Player
Free Free, with optional donations via PayPal or bitcoin.	Paid Commercial app; see the developer's website for current pricing.
macOS	macOS
Plays MKV, AVI, WMV, WebM and other formats via FFmpeg Automatic subtitle download from NapiProjekt	Plays 250+ formats via FFmpeg Color-accurate playback using macOS frameworks
Website and subtitle source are aimed at Polish users macOS only, and a large download of about 260 MB	macOS only Closed source, unlike VLC or IINA
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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