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Mac Sai vs Cleaner One Pro: catalog facts
Mac Sai	Cleaner One Pro
Free Free and open source.	Freemium Free to download from Trend Micro, with some features offered as a paid upgrade.
macOS	Windows, macOS
Cleaner, optimizer and malware scanner in one app Apple-notarized builds	Shows what is filling the disk and helps free up space Available for both macOS and Windows
macOS only Young project from a single maintainer	Closed source commercial software Offers little that the built-in system storage tools cannot do
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	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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