Originally Posted by Motortrend.com

An on-board accelerometer allows Track apps to measure the car's g force as it pulls from left to right while turning, or fore and aft while accelerating and braking. Track apps can also measure 0-30 mph, 0-60 mph, and 0-100 mph times, and for drag racers, eighth-mile and quarter-mile times. All five of those metrics can be initiated with a virtual drag racing start light, so Mustang drivers can hone their skills off the track.