Google Maps app lets me navigate (find directions/routing) along the public road network or pedestrian routes. Is there a way or an app that lets me load my own track network (http://radrouten.org/rr.kmz) and find the shortest path from A to B along my tracks?
I'm doing the Google Maps thing already though it's not what I really want. It means I need to fix the smartphone to the handlebar, have the display light always on. With routing along my tracks I could leave the smartphone in my pocket and listen to the routing via headphones.