Tinder (app)

Tinder is an online dating and geosocial networking application launched in 2012. On Tinder, users "swipe right" to like or "swipe left" to dislike other users' profiles, which include their photos, a short bio, and some of their interests. Tinder uses a "double opt-in" system, also called "matching", where two users must like each other before they can exchange messages.