In the Pocket PC app I've installed, the "Tach" screen is running. Can you give me some real-world models of how this screen should be used?

There are aftermarket devices called shiftlights, whereby a driver sets a given RPM value where he intends to shift gear, when the engine revs up to the preset value, a light blinks, to indicate to the driver his shift point. They also use this to monitor Redlining of the engine. e.g's units are http://www.autometer.com/cat_gaugeseries.aspx Using SoftDash, the tach screen gives the user a software controlled shift indicator, along with all the software goodies such as custom skin, voice over etc, all from their handheld unit. Furthermore, some people can make custom recipes(in the new software only) that respond to tachometer events, e.g if RPM past a certain value, do some intended action.  more