When your spouse is returning home in the evening, how many times do you call her to find out how far have she reached? If you do it frequently, this is an App for you. Now, she can update you on her current location as she moves in closer and closer. The app keeps updating the location marker as she moves ahead. The broadcast is person-to-person and thus absolutely private.
Sometimes, when you are visiting a get-together function, you may be calling frequently to your friends also attending the same party that you would be reaching soon. This app can help you broadcast your location to your buddies in a secured way. The broadcast can be on SMS, email, or many other social networks such as tweet, Facebook, and so on.