Ok all you smartest boaters on the water, never have you steered me wrong when I needed advice so I am back to ask for even more.
I asked the marina to give a price on installing a GPS speedometer while they had it this winter. "It won't be that much" turned into far more than I cared to spend. Thankfully a tech curious about which speedometer I wanted called and let the cat out of the bag that it was, oh slightly more than "not that much".
Long story short, I don't have time to install one at this point because I don't want to take the boat out of the water, etc. So I'm looking for an Android App that will suffice until I want to make time to do it myself. Don't mind paying for one if it is worth it.
Thanks again.

Jimm