iSpeedMeter
iSpeedMeter enables you to do plenty of cool speed-related stuff like:
iSpeedMeter has a very user friendly and easy to use graphical interface.
The app runs on iPhone 3G, iPhone 3GS, iPhone 4 and iPhone 4S.
Check it out!
iSpeedMeter is available on the App Store ($0.99).
There is also a free version available: iSpeedMeter Lite. It features the speedometer and the 0-100 km/h and 0-60 mph functionality.
If you have any comments or suggestions, or if you find a bug in the app, please feel free to e-mail us at support@decagonsoftware.com