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FolderSizes vs QDirStat: catalog facts
FolderSizes	QDirStat
Freemium Free version available, with a paid Pro upgrade.	Free Free and open source under the GPL version 2.
Windows	macOS, Linux
Analyses network shares as well as local drives Scheduled reports with email delivery	Treemap plus tree view of disk usage No KDE dependencies
Windows only Some features require the paid Pro edition	No Windows version Interface is dense for casual users
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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