Compare software

BlockSiteLeechBlock NG
Freemium

Free to start; BlockSite Premium is a paid subscription with a 30-day guarantee.

 Free

Free to install and use.

Android, iOS, Browser extension Browser extension
  • Blocks both websites and apps
  • Focus Mode for timed work sessions
  • Up to 30 block sets, each with its own schedule
  • Blocks by fixed time period, time allowance or both
  • Some features require a paid Premium subscription
  • Closed-source commercial product
  • 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 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

Checked September 23, 2026

Checked September 23, 2026

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