This app is alright if you want to putz around the neighborhood or if youre in an area where there is a large population to go to for help. I would not recommend using your smart phone and this app together, you are asking for trouble. If you do use this app make sure to bring along a map, compass, matches (fire starter), knife, and always have in the back of your mind a readiness to sleep in the forest when you cant get home.
I travel with a map a compass and my trustworthy talk to the satellites Garmin. We are in a sport that is expensive, dangerous, adventurous, always evolving and a lot of fun! You know the old adage "you get what you pay for", and direction are no exception.
Be safe...be smart, have fun!
JVB