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Cold Turkey Blocker vs LeechBlock NG: catalog facts
Cold Turkey Blocker	LeechBlock NG
Freemium Free website blocker, with a paid upgrade for more features.	Free Free to install and use.
Windows, macOS	Browser extension
Blocks desktop apps as well as websites Locked blocks that are hard to bypass	Up to 30 block sets, each with its own schedule Blocks by fixed time period, time allowance or both
Desktop only, no phone apps Some features require the paid version	Browser extension only, so blocks apply inside supported browsers and not to other apps No Safari version; the site points macOS and iOS users to the separate ivBlock app
Downloadable app	Browser extension
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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