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AirStats vs Mac Performance Monitor: catalog facts
AirStats	Mac Performance Monitor
Free Free with no account, trial or paid tier.	Free Free and open source.
macOS	macOS
Very low CPU and memory footprint 24-hour history for each metric	Recorded history to find when a slowdown began Compare process traces on one timeline
macOS only Newer project with a short track record	Apple silicon only Requires macOS 15 or later
Downloadable app	Downloadable app
Closed source	Open 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.