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SelfControlBlockSite
Free

Free and open source, supported by donations.

 Freemium

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

macOS Android, iOS, Browser extension
  • Block cannot be undone until the timer expires
  • Survives restarts and deleting the app
  • Blocks both websites and apps
  • Focus Mode for timed work sessions
  • macOS only
  • No way to end a block early if you set it wrongly
  • Some features require a paid Premium subscription
  • Closed-source commercial product
Downloadable app Downloadable app, Browser extension
Open source Closed source
License not stated License not stated
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked October 1, 2026

Checked September 23, 2026

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