Start Locomo when going to work or returning home and stop worrying about which train is next and which platform you need to go to. Locomo will show you how much time you have left, if your train is on time and which platform you need to go to.

It uses geolocation to detect if you are going from home to work or the other way around.
Use the up and down buttons to navigate to earlier or later trains (or refresh by going all the way up). The middle button will switch modes between going to work or returning home.

Only works in the UK (for now).