Worried about missing your station when you are on a train?
Here is the an app which alerts you before you reach the destination.
Launch the app. Enter your destination.
Set how many minutes before you wanted to be alerted before reaching your destination.
Features include:
Displays remaining distance
Estimated time of arrival
Speed & current location
Ability to start new tracker.
Ability to change alarm time.
"Continued use of GPS running in the background can dramatically decrease battery life."