Keep the disntance for your trip and allow you to add or substract distance to it. This is specially usefull as a roadbook companion app.
You can use the volumen buttons to add or substract meters.
The KML file will be saved on Documents/DistanceTracker/

Can be increased or decreased manually using the volume buttons or media next-previous button this is very useful to be used with a bluetooth remote.

Also support miles.