Want to prove you're a better driver than your friends? There's a growing list of apps to do just that. These apps look at information collected from a smartphone's GPS, accelerometer and gyroscope to sense if you brake or accelerate sharply, determine how fast you drive, and whether you make jerky turns. Not surprisingly, insurance companies have an increased interest in obtaining the data collected on drivers' smartphones. The information will be used to understand what type of driver you are, and the companies say your rates won't go up as a result. In fact, U.S. -based insurers such as Liberty Mutual, Allstate (ALL) and State Farm offer programs for drivers to receive a car insurance discount for submitting such information.

http://money.cnn.com/2016/08/17/technology/smartphone-driver-safety/index.html?iid=hp-stack-dom