Nice graphics but!
The problem with this and any other GPS device is that you have to be moving to get a compass bearing. When I tied out this application I found you had to be move a lot to get the compass bearing to change at all. I tried walking around with it. Nothing. So I got in my car and drove and sure enough I got a reading of my direction, but the speed recorded by the device was way off, showing 9km when I was doing 20.
So I think selling this as a "compass", even at 99c is misleading.
TrackerTom about
Digital Compass