FourSquare is a great mobile application that connects you and your friends in exploring your city. You would use foursquare to “check-in”, which is a way of telling us your whereabouts by your phone. When you check-in someplace, we’ll tell your friends where they can find you and recommend places to go & things to do nearby. People check-in at all kind of places – cafes, bars, restaurants, parks, homes, offices. You can earn badges by check-in at a particular place more then others. Once FourSquare determines that you are the person who most frequents a place, you are declared the Major!