Speedo HD Free - Displays current and maximum speed on a gauge.
Designed for the 960x640 Retina screen in the new iPhone 4, but will work with the iPhone 3G/3GS. This App does not work on the iPod touch.
*Auto lock is disabled while this program is running*
*GPS requires a good signal so anything over 20m horizontal accuracy will give poor performance of the speedo*
Instructions :-
Tap on the gauge face to reset the maximum needle
The settings for mph/kph are under the main iPhone settings, if the App is running and you change a setting you will need to terminate the App in the Task menu to see any changes.