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Sensei vs eul: catalog facts
Sensei	eul
Freemium Free download, with a paid version available to buy.	Free Free and open source on GitHub.
macOS	macOS
Real-time CPU, GPU and battery stats in the menu bar Customizable widgets and dashboards	CPU, memory, network and battery readings in the menu bar Shows Bluetooth device battery levels
macOS only Some features require a paid purchase	macOS only, 10.15 or later Development pace appears slow
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 1, 2026

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