Speed Dashboard for Driving, Boating
Here is a handy app that turns your iPhone into a dashboard to give you critical information on your adventures. Speed shows how fast you are going, how far you have traveled, how high above sea level you are, and how far you are from where you started.
The app shows GPS signal strength, altitude, speed, latitude, longitude, timer, battery charge level, and other important metrics. You can download the app for under $2 at this time.