Excellent App!
Use it every flight! I use both the GPS Ground Speed and the ADF instrument (GPS based) on every flight. Several other well appointed instruments as well. Very easy to see in flight and works flawlessly. The ADF points to the GPS target entered and gives DME. A quick glance is all that is needed to see if you are heading to your target. My private grass strip is somewhat hidden in a forest so this is quite helpful. Thanks!!