Hi, I have been using a Garmin Edge 810 to store routes I create in RideWithGPS so I know where to turn, etc. However, I have been having trouble with it, and thus I am looking for a good application that can sort of do the same on my iPhone.

In a nutshell, what I do is the following:
1) Use RideWithGPS to plan a route. I can then export this route as a GPX, KML, or other file format
2) The app would take this file/route, and would display it overlaying it on a map. As I cycle, it would show where I am and where I am supposed to go. Typical gps turn-by-turn direction stuff

That's it. No need for rerouting or anything like that. Frankly, if I just knew how to overlay a GPX track onto Google Maps on my iphone, so I can see it as I am using Google Maps that would be all that I need.

I am hoping somebody has an idea on how to do this.

Thanks in advance, and Happy upcoming New Year.

--Luis