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LeechBlock NG vs RescueTime: catalog facts
LeechBlock NG	RescueTime
Free Free to install and use.	Freemium Paid plans with a free 14-day trial; Timesheets can be bundled with Focus.
Browser extension	Web, Browser extension
Up to 30 block sets, each with its own schedule Blocks by fixed time period, time allowance or both	Passive tracking of apps and websites with no manual timers Goals, alerts and website blocking for focus sessions
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	Proprietary hosted service that needs an account Full features require a paid plan after the trial
Browser extension	Downloadable app, Hosted service, Browser extension
Closed source	Closed source
License not stated	License not stated
No account needed	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.