Digital Speedometer is a free GPS based digital head up display (HUD) that shows useful speed. It is very useful if you want to verify your vehicle speed when cycling, running, flying, sailing.
The display can be switched between normal viewing and HUD mode which mirrors the display for viewing asa a reflection in a vehicle windshield.
Also displays the longitudinal and transverse slope of the car, in degrees, the magnitude of ascent and descent in percentages.

Features:
Current speed (choose MPH, KMPH or KNOT)
Average speed
Maximum speed
Show Current time
HUD Display head-up (mirror affect)
Display road name
Display speed limit of the road
Display current weather condition
Display compass
Display odometer
Shows speed camera locations and warns

Usually Speedbox Digital Speedometer iOS app used & searched for

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