Speed

(Ad supported freeware)

This application turns your device into a speedometer and accelerometer. By assigning background colors to speed ranges you can see from the corner of the eye how fast you e.g. to avoid speeding.

Features:

The acceleration is color coded with a red background as well
Tap the small speed to toggle between mph and km/h
Tap the accelerator to make it larger

Related Applications:

SpeedoMeter - Meter the speed of your car
Speed Limit - Speedometer with warnings
Temperature - Your local outdoor temperature

More iPhone Applications: