Quad9 Connect is an Android and ChromeOS app that sends your DNS queries to Quad9's secure, private, open recursive DNS service.
Quad9 Connect adds additional functionality and features compared to using Android's Private DNS feature to utilize encrypted DNS or configured Quad9 in Chrome on ChromeOS.
The application creates a split VPN tunnel with Android API "VpnService" to configure an alternate DNS server on Android and ChromeOS.
- DNS over TLS or DNS over UDP
- DNS Query Log
- Trusted Networks
- Blocked Query Notifications
- Local Domains
- Excluded Applications
Quad9 connect uses the following third-party software:
Pcap4J by Kaito Yamada - MIT
MiniDNS by Rene Treffer - WTFPL
acra by ACRA - Apache
conscrypt by google - Apache
AppIntro by AppIntro - Apache
- Po Yuan Su - Original Author
- Ensar Sarajčić - Developer
Quad9 Connect - Android application for Quad9 recursive DNS cybersecurity and privacy services Copyright (C) 2025 Quad9 DNS
This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License along with this program. If not, see https://www.gnu.org/licenses/.
