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Mac Performance Monitor vs AirStats: catalog facts
Mac Performance Monitor	AirStats
Free Free and open source.	Free Free with no account, trial or paid tier.
macOS	macOS
Recorded history to find when a slowdown began Compare process traces on one timeline	Very low CPU and memory footprint 24-hour history for each metric
Apple silicon only Requires macOS 15 or later	macOS only Newer project with a short track record
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	No account 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.