Mobile app · Security & privacy

Rethink: DNS + Firewall + VPN

Firewall apps, use WireGuard VPN, monitor network, block malware, change DNS.

Completely free
Android
Open source

Ad-supported exit link (Clictune): an intermediate page may show for a few seconds before the official website. Direct link to the website, no intermediate page

Download from the official source

Link to the official download page, ad-supported (Clictune): an intermediate page may show for a few seconds. Direct link to the download

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Geographic availability: No geographic restriction found in our sources; availability is not checked country by country.

Technical details

Pricing: Completely freeconfirmed by F-Droid
Excerpt from rethinkdns.com, read on 8 November 2026
ng | rethinkdns dns android firewall downloads docs blog pay as you go anonymous and transparent monthly plan $ 1 per month % off $ 1 billed every month buy half yearly plan $ 0.9 per month 10 % off $ 5.4 billed every six months buy annual plan $ 0.75 per month 25 % off $ 9 billed annually bu Open the page
License: Apache-2.0 — Open source (permissive)confirmed by F-Droid
Open source: Yes
Commercial use: Yesconfirmed by Official plan pages (pricing, licence, terms), F-Droid
Account required: not documented
Credit card required: Noconfirmed by F-Droid
Watermark: Not applicable
Ads: No
Platforms: AndroidEstablished by Android: F-Droid
Publisher: The RethinkDNS Authors
Latest version: v0.5.8 (16 October 2026)
Latest activity: 16 October 2026
Source code: github.com/celzero/rethink-app

Overview

Rethink: DNS + Firewall + VPN is a firewall, available on Android.

Services and protocols mentioned: WireGuard.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information

“Firewall apps, use WireGuard VPN, monitor network, block malware, change DNS.” — F-Droid, 10 November 2026
“A multi-hop WireGuard client, an OpenSnitch-inspired firewall and network monitor + a pi-hole-inspired DNS over HTTPS (DoH), Oblivious DoH, DNS over TLS (DoT), DNSCrypt client with blocklists.” — GitHub, 10 November 2026
“A multi-hop WireGuard client, an OpenSnitch-inspired firewall and network monitor + a pi-hole-inspired DNS over HTTPS (DoH), Oblivious DoH, DNS over TLS (DoT), DNSCrypt client with blocklists.” — GitHub, 10 November 2026

At a glance

Rethink: DNS + Firewall + VPN is completely free: it is open source software, and every feature is available without paying or subscribing.

Its licence (Apache-2.0) is a permissive open source licence: use, modification and redistribution are allowed, including in commercial projects.

Plans and conditions

The publisher also offers paid plans (hosting, support or services); they are described on its website.

Strengths

Open source code
No advertising
Commercial use allowed

Sources and checks

Facts collected from Official plan pages (pricing, licence, terms) (limits, commercial use) — 8 November 2026
Facts collected from F-Droid (credit card, source code, publisher, licence, free status, platforms, ads, commercial use, version) — 6 November 2026
Last technical check: 5 November 2026
Description from F-Droid — F-Droid (citation courte)

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