Compare software

Quad9 ConnectAdGuard Ad Blocker
Free

Free and open source; the Quad9 DNS service is also free.

 Freemium

The iOS app has a free edition and a paid Pro edition; prices for other apps are not…

Android Windows, macOS, Android, iOS, Browser extension
  • Official app from Quad9
  • Works on Android and ChromeOS
  • Filters ads and trackers in apps as well as browsers
  • Android app works without root access
  • Tied to the Quad9 DNS service
  • No iOS or desktop version
  • Features differ between the platform versions
  • Licensing details are not stated on the overview page
Downloadable app Downloadable app, Browser extension
Open source Closed source
License: AGPL-3.0-or-later License not stated
Not stated if an account is needed Not stated if an account is needed
Needs internet 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.