Speedometer, Speed Limit Alert!

1. Step-by-step audio notifications once you have reached your required speeds.2. Battery life (iPhone 5S, poor light outside, 100% => 20%):Background mode (iPhone asleep): ~ 9 hSpeedometer (speed, distance): ~ 4 hTrack-enabled map: ~ 2 h 30 minVideo: http://youtu.be/8Vq_MVeX5H4