Compare software

CurboxBlockSite
Free

Free and open source under the GPL 3.0 or later.

 Freemium

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

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

Checked September 23, 2026

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