Tinder is the location-based version of hot or not.

Tinder is a new mobile-only dating app. Think of Tinder as "hot or not." If you see a photo of someone you're interested in, you can "like" them. If that person likes you back, you can start a conversation and decide if you want to meet in person.

Tinder is relatively new, but it's already immensely popular.

Price: Free

Available for: iPhone and Android