A free program for Android, by Verkehrsverbund Rhein-Sieg.
VRS is an app that makes it easy to plan and buy tickets for public transport in the vicinity of your location.
With it, you can search for connections, see real-time timetables, and get an overview of the rail network in the vicinity of your location. You can also see how much a ticket costs and which train or bus you can travel on at the station you choose. You can also get an overview of the types of transport you can use at the station you choose.
