Rally Navigator: Road Rally - How it Works 

But still, I cannot believe that the driver actually hears or reacts to the pointer navigator is giving....that is amazing. I'd like to hear what is the difference between having or not having one. In video would be perfect. Thank you for your explanation.

Mike, sundenly my drag turn into light grey, instead of black. i can't figour out how to get it black again.

how to create gpx file to load it to other apps? when I used pring - GPX option in your program it only made .txt file

Bravo!!!