TIME - Feb 5 - Tinder has become a dating phenomenon in just 17 months. Its founders Sean Rad and Justin Mateen first met in a private high schools in LA but their story began at University of Southern California in 2004. They were both working on their own side businesses, so they decided to join forces. Rad is responsible for introducing Mateen to the iPhone. It changed his life. In the beginning, 90% of Tinder users were between the ages of 18 and 24. After 17 months of growth, Tinder’s college-aged users are ~50%. “We always saw Tinder, the interface, as a game,” Rad said. "It doesn’t even matter if you match because swiping is so fun.” Rad found his serious girlfriend on Tinder. Future plans involve helping people get to know the people they have been matched with better.