Compare software

WhatSize vs Monolingual: catalog facts
WhatSize	Monolingual
Paid Shareware costing $14.99, with a $9.99 upgrade price and a 30-day free trial.	Free Free and open source under the GPL-3.0 licence.
macOS	macOS
Largest files and folders listed first Finder-style column view for drilling into folders	Reclaims several hundred megabytes by removing unused localizations Older versions kept available for many past macOS releases
macOS only Paid after the 30-day trial	Current version needs Apple silicon and macOS 27 or later Removing system files carries some risk if you later need another language
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
No account needed	No account needed
Works offline	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.