[Lancelot]

I've been to the track this weekend and wanted to measure my laps with the M Laptimer app, but it's been useless, as you can see from attached screenshot it shows me running about totally outside of the track, here you can see the track is pointing completely not in the direction of the track etc.

Why would that be?
Is the laptimer app using the iPhone GPS/accelerometers? the iphone wasn't properly held so it could have been measuring wrong acceleration but I was expecting the app to use the car data only (as it does with steering angle, throttle, speed, etc.)

Thanks!