Match.com has 21,575,000 users, eHarmony has 15,500,000, and Tinder has a whopping 50,000,000 active users. Tinder launched August 2012 as a pilot app at the University of Southern California. As the matchmaking talk of the town, Tinder uses Facebook and geolocation technology to match mates within users’ specified search radius, age, and location. Unlike mainstream Internet dating services, users accept (swipe right) or deny (swipe left) matches based on profiles with just a few photos, interests (according to their FB profile) and one tagline. What makes Tinder also unique is that users can only message mutual matches.