Kennzeichen Reise - Sammeln S is a free Android travel and navigation app developed by Torben Soennecken. With this app, users can search for license plates and get relevant information about the related cities, districts, or institutions. The app supports search for license plate abbreviations in Germany, Austria, Switzerland, France, Poland, and Czech Republic, as well as regional units (cities, municipalities) in Germany. The app has a total of 1580 license plates andregional units in its database.

One of the app's features is the ability to track the user's progress in collecting license plates. This feature is done through the use of color-coded maps that show the user's progress in different regions. The app also allows users to customize the app's color scheme, search settings, and switch between the two search modes offered. Additionally, users can discover interesting information about the cities or institutions related to their searched license plates, such as their culture, history, or geography.

The app is ad-free and does not require an internet connection, making it a suitable companion for road trips or travels. Users can contact the developer via email or Twitter for feedback, suggestions, or bug reports.