Compare software

BlockSiteCurbox
Freemium

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

 Free

Free and open source under the GPL 3.0 or later.

Android, iOS, Browser extension Android
  • Blocks both websites and apps
  • Focus Mode for timed work sessions
  • Blocks Reels and Shorts without blocking the whole app
  • Wide choice of unlock challenges, including NFC and QR codes
  • Some features require a paid Premium subscription
  • Closed-source commercial product
  • Android only
  • Self-imposed limits can still be worked around by a determined user
Downloadable app, Browser extension Downloadable app
Closed source Open source
License not stated License: GPL-3.0-or-later
Not stated if an account is 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 2, 2026

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