Free speedo app to calibrate PP?
 

What's a good, free, speedo app you guys have used for PP calibration?

I used gps speedo

On Android I like speed gauge, as it displays to tenths. Assuming our course is to specs a stop watch shows it to be accurate.

I have iphone, thanks for the replies

I have an iPhone also and I used adaptunes. Worked well for me

Handheld GPS!

Garmin or Tom Tom nav unit.

sea tow has a free app with a speedo

I have not had a chance to try it yet, but I picked up Boat Speed.

On my iPhone I use "digital speedometer". It's free and shows down to the tenth.

i use speedometer pro
free and works well
easy to read

giddup