The compass can tell you which direction you are going. I've tried most of them and none is optimal. I find gpsCompass getting better with every release; there are also different styles of the compass to choose from. It's also relatively inexpensive. Compass Go looked good in theory but needs a lot of work. I also like the compass on GPSCockpit, but it's small. I still have to try GPS Cardinal but it seems redundant given that I have gpsCompass.