# celzero/rethink-app

DNS over HTTPS / DNS over Tor / DNSCrypt client, WireGuard proxifier, firewall, and connection tracker for Android.

Repository: https://github.com/celzero/rethink-app
Canonical: https://ross.abutalabs.com/products/rethink-app
Homepage: https://rethinkfirewall.com/
Language: Kotlin
License: Apache-2.0
License Family: permissive
Topics: android-app, firewall, android-firewall, dns-over-https, internet-freedom, anti-surveillance, anti-censorship, censorship-circumvention, censorship-resistance, android-application, open-source, privacy-enhancing-technologies, dnscrypt, dns, android, wireguard
Last push: 2026-08-24T17:44:52+00:00

## Health v2 (maintenance only)
Score: 98/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 96, longevity 100
- inputs: {"age_days": 2277, "days_push": 9, "days_rel": 24, "gap_med": 9.5, "n_releases_24m": 5}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 5338, forks 327 (observed 2026-08-28T04:09:15.779852+00:00)

## What it is
Rethink DNS + Firewall is an open-source Android app combining an encrypted DNS client (DoH, Oblivious DoH, DoT, DNSCrypt) with blocklists, a per-app firewall, and a WireGuard-based VPN/proxifier with split tunneling. It lets users block ads, trackers, and malware, control app internet access by rules, and route traffic through multiple tunnels.

## Use cases
- block ads and trackers system-wide on android
- encrypt dns queries to bypass isp surveillance
- circumvent internet censorship on android
- block specific apps from accessing the internet
- route apps through wireguard tunnels with split tunneling
- monitor which apps make network connections
- use dnscrypt or dns over https on android

## When to choose
- you want a free, open-source all-in-one DNS, firewall, and VPN tool on Android
- you need per-app firewall rules based on screen state, metered connection, or app category
- you want to combine multiple WireGuard tunnels with encrypted DNS in one app

## When to avoid
- you need a firewall or DNS client on desktop platforms like Windows, macOS, or Linux
- you want a full commercial VPN service with managed servers rather than a client you configure yourself
- your device cannot run a local VPN service (e.g., managed restrictions preventing Android VPN slot usage)

## Facets
- artifact type: application
- maturity: active
- function: vpn, networking, privacy, proxy, caching, monitoring
- domain: privacy, security, networking, censorship-circumvention, android-tools, self-hosted
- platform: -
- tags: dns-over-https, dnscrypt, wireguard, firewall, ad-blocking, blocklists, split-tunneling, connection-tracker, kotlin, open-source, android, mobile

## Member repositories
- celzero/rethink-app (main) score 98

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:15.779852+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:58:50.961531+00:00, confidence not recorded.
  - readme: https://github.com/celzero/rethink-app (fetched 2026-08-28T04:09:15.779852+00:00, sha 0f0d29052403)
  - homepage: https://rethinkfirewall.com/ (fetched 2026-08-29T08:53:20.466592+00:00, sha 5ce8fbe2ea2c)
  - site_page: https://docs.rethinkdns.com (fetched 2026-08-29T08:53:20.474039+00:00, sha 271779566180)
  - site_page: https://docs.rethinkdns.com/ (fetched 2026-08-29T08:53:20.469360+00:00, sha 271779566180)
  - site_page: https://rethinkdns.com/faq (fetched 2026-08-29T08:53:20.471386+00:00, sha 1fe2dea889dc)
- Data as of 2026-08-30T08:39:29.467469+00:00.