Discovering Cologne by bus and tram is easy with this app, that has ever single bus, tram, and train route, all at your finger tips.
The data is stored offline, so you don't require any data when getting there.
We also include all the must see locations, making it even easier to see everything you want to see, and get there.
Cologne has a very good subway/tram and bus network "KVB" (Klner Verkehrsbetriebe); one- and three-day-passes are available. The tickets are valid for subway, tram and regional train within the VRS-network. ... Regional Trains are known as "S-Bahn", "Regional-Bahn" and "Regional Express".