Current train information
An app that gives you live information about the train you're on, similar to ICE Buddy, with features like:
- List of next stops
- Map with stops
- Notifications 10min before your stop, or when there's delays
- Map of the train, (which cars are which class, where the restaurant is, etc.)
- Search for seat numbers
I have no idea which of these things are possible API wise, and with which train companies, this may only be possible for Deutsche Bahn.