LineNetwork Cologne is a free travel and navigation app developed by dieEinsteiger. The app is available on Android devices from Gingerbreadto NougatIt provides simple zoomable line network maps for the local public transport in Cologne and Aachen tariff area VRS and AVV. The app includes the route network for light rail (U-Bahn), suburban rail, regional train, streetcar, bus, express bus, and long-distance transport.

The app offers a few tabs with different types of transit maps that are easy to use offline for scrolling around, zooming in and out. The maps are suitable for all people from Cologne, Bonn, Aachen, and tourists. The app also includes a tourist plan with points of interest and a night plan for night trains, S-Bahn, regional trains, and buses. The metro line network is also known as underground, rail transit map, urban tube map, or public subway.