This app is one of the unusual tracking apps. It works by recording where you walk. Thus, you can start recording when you leave your car and stop when you get to the entrance. You can then reverse those directions and the app will tell you how to get to your car. You can also share your paths with other people.
That makes it really easy to help them find you in something like an amusement park or festival. However, it does work most of the time.