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Mac Performance Monitor vs iStatistica: catalog facts
Mac Performance Monitor	iStatistica
Free Free and open source.	Paid Paid app, with a download available from the developer's site.
macOS	macOS
Recorded history to find when a slowdown began Compare process traces on one timeline	Menu bar monitors and Notification Center widgets Alerts that can run a command or workflow
Apple silicon only Requires macOS 15 or later	macOS only Sensor and fan data require a separate plugin
Downloadable app	Downloadable app
Open 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 September 23, 2026

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