# julian-klode/dns66

DNS-based Host Blocker (and lightweight ad blocker) for Android

Repository: https://github.com/julian-klode/dns66
Canonical: https://ross.abutalabs.com/products/dns66
Homepage: https://jak-linux.org/projects/dns66/
Language: Java
License: GPL-3.0
License Family: copyleft
Topics: android, blocker, adblock, ad-blocker, java, gradle, gplv3, fdroid
Archived: true
Last push: 2026-03-02T21:45:42+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 70, release rhythm 8, longevity 100
- inputs: {"age_days": 3609, "days_push": 184, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2248, forks 209 (observed 2026-08-28T04:06:30.289965+00:00)

## What it is
DNS66 is an open-source Android app that blocks ads and malicious hosts by intercepting DNS queries through a local VPN service. It uses configurable hosts blocklists and supports custom upstream DNS servers without requiring root.

## Use cases
- block ads on android without root
- filter malware domains system-wide
- use custom dns servers on android
- reduce mobile data usage by blocking trackers
- block ads in apps and browsers via dns

## When to choose
- you want root-free, system-wide ad blocking on Android
- you prefer free-software apps from F-Droid
- you want DNS-level blocking with custom blocklists and upstream servers

## When to avoid
- you need HTTPS-level ad filtering that DNS blocking cannot catch
- you need IPv6 DNS server support
- you want automatic blocklist refreshes and polished UX

## Facets
- artifact type: application
- maturity: active
- function: security, privacy, networking, proxy
- domain: privacy, android-tools, security, networking
- platform: -
- tags: ad-blocker, dns, vpn, host-blocking, fdroid, root-free, android

## Member repositories
- julian-klode/dns66 (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:30.289965+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 2026-08-30T02:43:57.055603+00:00, confidence not recorded.
  - readme: https://github.com/julian-klode/dns66 (fetched 2026-08-28T04:06:30.289965+00:00, sha 91ff60d96fa9)
  - homepage: https://jak-linux.org/projects/dns66/ (fetched 2026-08-29T10:24:08.752359+00:00, sha 11c280229f7e)
  - site_page: https://jak-linux.org/about (fetched 2026-08-29T10:24:08.762294+00:00, sha 3c1be160da15)
- Data as of 2026-08-30T08:39:29.467469+00:00.