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Quad9 Connect vs BlockAds: catalog facts
Quad9 Connect	BlockAds
Free Free and open source; the Quad9 DNS service is also free.	Free Free and open source under the GPL-3.0 licence, funded by sponsorships.
Android	Android
Official app from Quad9 Works on Android and ChromeOS	Works without root through a local VPN Optional root mode using iptables
Tied to the Quad9 DNS service No iOS or desktop version	Local VPN mode occupies the Android VPN slot HTTPS filtering is still in beta
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0-or-later	License: GPL-3.0
Not stated if an account is needed	No account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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