"Speedcheck" app

I thought I would share this info as it applies to boating. I downloaded this free app on my iPhone last night and was able to check the speed of my boat this morning.
My 198? Mariner 9.9 on an Alumacraft 1448 with pretty much nothing on board got a top speed of 19.6 mph.

The app appears to be pretty accurate, too, as I checked it against the speedometer of my 198? Grand Wagoneer.

The best part is it works without a cell signal. Which is most everywhere around my parts.

Thanks for letting us know. I'm gonna check it out.

For you android guys like me... I use the free app "SpeedView". Its extremely accurate.