Tinder is a free, location-based mobile dating app that makes it easy to connect with people. The idea is to let users show Tinder the type of people they want to date. Many times, people say they like a type of person but actually goes for someone else. But what are the numbers that define Tinder as an online dating service? It takes a long time to reach 50 million users. A lot of popular social media brands invested heavily to achieve this milestone.