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Mac Sai vs PrettyClean: catalog facts
Mac Sai	PrettyClean
Free Free and open source.	Free Free to download and use.
macOS	macOS
Cleaner, optimizer and malware scanner in one app Apple-notarized builds	Cleans developer build caches as well as system caches Shows every scanned file before cleaning
macOS only Young project from a single maintainer	macOS only Not open source
Downloadable app	Downloadable app
Open 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	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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