[jj6426]

Oh my gosh I can't believe all the responses I got. Thank you all so much! I am going to try the GPS from my car. And if that doesn't work, I now know many apps I can use from my new Smart Phone!

[Dr Winston O Boogie jr]

I have a speedometer. It serves two purposes. One it tells me how fast I'm going, but more importantly, I reset the odometer every morning so I know how many miles I've traveled that day.

[PaulDenise]

Speed Box on the iphone works great for this purpose.

[Kgcetm]

Go to apps and search for speedometer. There should be several free apps that will tell you how fast you are going.