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System Mechanic vs Avast Cleanup: catalog facts
System Mechanic	Avast Cleanup
Paid Paid license, listed at $54.95 and often discounted.	Paid Paid product with a free trial.
Windows	Windows
Combines junk cleanup, startup management and privacy wiping Automated maintenance through ActiveCare	Junk file removal and registry cleaning in one tool Targets slow boot times
Windows only Closed source and paid	Paid after the trial Registry cleaning brings little measurable benefit on modern Windows
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 24, 2026

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