I'm trying to find an application for my iPhone 4 that will keep track of a predetermined route while in route. I know I am probably looking for more than one thing, an on-line site for route planning, downloaded maps and an app for the iPhone that will use the maps and routes to track my position along the route. I also understand that the effectiveness is going to be determined by cell reception. Does such a thing exist and does anyone have any suggestions? I've got BikeTracks already and it's find (also allows me to tag pictures) but it doesn't allow me to track my present position. Thanks for any help.