Hi there Coop,
Thanks for the feedback.
I'm a little embarassed to admit that I omitted the kms/miles mod in the app. I had it in mind but it must have got overlooked, there was a plan to add that mod in the two versions of the app (iPhone too), that'll have to be for the next update now
Regarding dirt tracks, yes it is possible as there is a road type 'trail' which can be used when adding a route. Where the route does not follow a road at all it is possible on the website to handle these in the true sense (i.e. where tracks do not follow any mapped road) as it is possible to upload a GPX file and have it completely parsed and shown on a map there, allow I have not ported this functionality to the app yet.