Processing
Hybrid
How product activity is processed.
INDEPENDENT SOFTWARE
Rethink DNS + Firewall
An open-source Android firewall, DNS client and VPN interface for controlling application network access and blocking trackers.
- Mobile · Self-hosted
- Hybrid
- Open source
- Pricing
- Freemium
- Category
- Privacy and security
Privacy at a glance
A quick view of the dimensions most useful for comparing this product. Unconfirmed facts stay explicitly unconfirmed.
Identity
Optional account
Whether an account is needed to use it.
Tracking
Optional telemetry
Reported analytics and tracking posture.
Ownership & source
Open source
Availability of the product source code.
Offline support
No
Whether core use can continue offline.
Self-hosting
Partial
Whether you can run it on your own infrastructure.
What to know
Why it stands out
- The local firewall can expose and block individual application connections without rooting the device.
- The project publishes its application and resolver code, supports custom DNS and states that the Android app does not sell or collect user data; Play crash reporting is opt-in.
Trade-offs
- A DNS resolver or VPN operator can observe network metadata appropriate to that service; privacy changes when users select Rethink-hosted, third-party or self-hosted endpoints.
- Android permits only one active VPN-based local firewall at a time, so Rethink can conflict with another VPN unless its integrated proxy or RPN options are used.
Best for
Android users who want detailed control over application network access, encrypted DNS and tracker blocking in one open-source interface.
Consider another option when
Users who need to run a separate full-device VPN simultaneously without configuration or who expect a firewall to anonymize all traffic.
Technical details
Complete privacy-profile dimensions, grouped for easier review. Each value is retained from the catalogue record.
4 groups · 18 dimensions
- Processing
- Hybrid
- Storage
- Temporary
- Offline support
- No
- Self-hosting
- Partial
- Data export
- Partial
- Data deletion
- Yes
Alternatives
Mullvad VPN
A subscription VPN service designed to minimize account data and avoid logging users' browsing activity.
View profile
Firefox
An open-source web browser with tracking protection, optional synchronization, and configurable data-collection controls.
View profile
LibreWolf
A community-maintained Firefox derivative with telemetry removed and privacy and security settings hardened by default.
View profile
Evidence
5 public sources collected
- Rethink DNS + Firewallrethinkdns.com · Product page · Android firewall, DNS, monitoring and filtering features
- Rethink Privacy Policyrethinkdns.com · Privacy policy · application collection practices, Play Crashlytics, DNS privacy and deletion
- Rethink Firewall documentationdocs.rethinkdns.com · Documentation · per-application network control
Review status: ListedLast reviewed: Not yet reviewedCatalogue updated: 20 Jul 2026
Listed means this profile was compiled from public sources and has not yet been reviewed.
Claim listing and corrections
Makers can request a listing claim, and anyone can submit an evidence-backed correction. Requests are reviewed before public profile information changes.