Its a great app. Simple to use and contains various functions. First of all , the main use of this app is for the gps location. It gives reading of 3m accuracy which is great. The app also have a compass feature in it which can be used for navigation and various other geological use. The app also have features like accuracy, altitude of the area, atmospheric pressure, etc . overall its a great app. The best thing about this app is that it is free of cost. Anyone can download it from the google play store. Myself being a geology student, I use this app every day when I am working at the field.