The VJoyCar C60s Universal Digital GPS Speedometer is an obvious choice if you just need something cheap but reliable. What to Consider When Choosing GPS Speedometers Types Round Gauge.

The 3.5-inch Universal GPS Speedometer is ideal for day-to-day driving, traveling, as well as racing. By the look of things, the manufacturer, Yunzong, designed this HUD for cars with a 12v plug.

Speedometer is a nifty US$1.99 universal iOS app that provides a speedometer for cars and cycling, as well as start times, time elapsed, distance, average speed, maximum speed and your altitude.

Speedometer: Aftermarket modifications, such as different tire and wheel sizes or a change in the differential gearing, can cause speedometer inaccuracy. GPS: These devices are positional ...