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Quad9 Connect vs Rethink DNS: catalog facts
Quad9 Connect	Rethink DNS
Free Free and open source; the Quad9 DNS service is also free.	Free Free and open source under the Apache licence. Optional paid resolver plans exist.
Android	Android
Official app from Quad9 Works on Android and ChromeOS	Firewall, encrypted DNS and blocklists in one app with detailed logs Supports WireGuard alongside its own filtering
Tied to the Quad9 DNS service No iOS or desktop version	Uses the VPN slot, though it can proxy a WireGuard tunnel through itself The amount of configuration is daunting at first
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0-or-later	License: Apache-2.0
Not stated if an account is needed	Not stated if an account is 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 September 22, 2026

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