The use case for this app is fairly simple. You use your iPhone to tag a location (say where you parked your car), then you wander around and do whatever, and then when youre ready it guides you back to your car via GPS. A feature that you can elect to use, if its valuable to you, is the parking meter function. This lets you set a timer and be notified when your meter is about to run out. This feature would be super useful if I was downtown during business hours. You can also take photos of where you are, like leaving a trail of breadcrumbs, and you can email or text your location to others. Loads of features - highly recommended!