Compare software

LeechBlock NGFocus
Free

Free to install and use.

 Paid

Paid app with a free trial download.

Browser extension macOS
  • Up to 30 block sets, each with its own schedule
  • Blocks by fixed time period, time allowance or both
  • Blocks both websites and applications
  • Pomodoro timers, schedules and profiles
  • 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
  • macOS only
  • Paid after the trial
Browser extension Downloadable app
Closed source Closed source
License not stated License not stated
No account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 23, 2026

Checked October 1, 2026

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