From the marketplace listing:
- See train schedules between any two Caltrain stations.
- See train schedules for any future and past date.
- See train schedules for any station at any time of the day.
- See train fares.
- See trains within the next hour (in green).
- See trains with extra bike cars.
- See live train schedule updates and news.
- See the Caltrain service map.
It's worth stressing that this app is unofficial, but I suspect it makes use of the the official Caltrain data provided through GTFS. It's still an impressive application that provides a service in a clean and easy to navigate environment, and one that is perfectly suited to a mobile environment.
You can download the app via the AAWP App Directory or the Windows Store.