Yeah yeah, alright, but this is meant to prove you were NOT speeding...... ! Anyway, please note that my pictures also show the kompass, which way you're heading, AND there are also apps that show the map, OR the address where you're at.....
Some time back I was looking at an app to display my speed digitally since the speedo in my bus is difficult to read (it's in kph & hidden behind the steering wheel.
The speed was displayed in large, green numbers on a black background.
I'd not bothered with this for some time - since I tend to use the 'waze' app (which displays speed), but I came back to the speed app again the other day.
Because of this, I noticed that my cam picked up the image as it was reflected on the screen - amazing really when you consider the sharp angles involved! Here, I'm doing 29mph.