Compass Live is a very handy app to have on your phone. You can use it for a lot of things, but mostly for finding your way. 

How to use it?

Just open the app and follow the instructions. When you start, you will be shown the first thing that you need to do. You need to move the device until you get the proper view. You can see the location on the map. Then you need to select the kind of compass that you want to use. The first one is the most important, so make sure that you select the right one.