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Qz

Michael von Glasow
Maps & Navigation
Version
2.2.0
Size
21.1 MB
Requires
Android API 14+
4.2 / 5 · 4,629 ratings 3 downloads
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Updated Sep 22, 2026

Quick answer

Receive live traffic news via Traffic Message Channel (TMC)

F-Droid repository metadata

Receive live traffic news via Traffic Message Channel (TMC)

Qz (pronounced “queues”) connects to an RDS/TMC receiver to receive live traffic messages. TMC is transmitted in the RDS data stream of various radio channels and provides live traffic information, helping you avoid congestions.

For a list of countries in which this app can be used, see https://gitlab.com/mvglasow/qz/wikis/countries.

In order to use this app, you will need a supported RDS/TMC receiver. The following devices are currently supported:

* GNS FM9-BT (requires Bluetooth) * Silicon Labs Si4701/4703-based USB tuners (requires USB OTG support)

If you are unable to pick up any traffic messages, despite having a supported device and being in an area which should be supported, check your antenna. Reception with pigtail antennas (a long piece of wire coming out of the receiver) is generally poor and insufficient for TMC. It is recommended to rely on your vehicle antenna, a building antenna or a somewhat decent room antenna.

Qz will only work with unencrypted TMC services (as encrypted services require paying a per-device royalty). Also, some countries have chosen to require paying a royalty for access to their location tables (which Qz needs to decode TMC locations) and are therefore not supported.

Photo by Joanna Pędzich-Opioła | CC_BY 2.0

Screenshots

Qz screenshot 1
Qz screenshot 2
Qz screenshot 3
Qz screenshot 4
Qz screenshot 5

What’s new

Updates to location tables (AT, BE, CH, FI)
Show country in list of messages
Supply country code in TraFF output
Report correct road classes for BE, ES, LU, NL, SE, SK
Show tuning info (frequency and TMC service) in main application window
Substitute CC/LTN/SID where no TMC service name is available
Show relative date for messages from previous days
Add German UI
Allow screen to turn off when no tuner is connected
Reduce screen flicker in main application window
Add debug logging (RDS input, Tra

How to install

  1. Download the APK from the button at the top of this page.
  2. Allow “Install unknown apps” for your browser or file manager only, not for every app.
  3. Open the downloaded file and confirm the installation.
  4. If installation fails with “App not installed,” remove an earlier build of the same app first. A signature conflict is the usual cause.

Data safety

  • Every file is checked against its published SHA-256 before it is listed.
  • Files are scanned for malware on every update.
  • The permissions each app requests are listed on its own page.
  • Read the full safety policy for how we test, flag, and delist files.

Frequently asked questions

What is Qz?
Receive live traffic news via Traffic Message Channel (TMC)
Who develops Qz?
Qz is developed by Michael von Glasow.
Which Android version does Qz require?
Qz requires Android API 14 or later.
What is the current version of Qz?
The synchronized F-Droid version is 2.2.0.
Which license does Qz use?
The signed F-Droid metadata lists GPL-3.0-or-later.
Where is the source code for Qz?
https://gitlab.com/mvglasow/qz

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