Tinder is a dating and social discovery application (available on both Apple and Android) which uses one's information on Facebook to look for suitable "matches". Filters by location and age may be applied to allow users to refine their search. More than 9 billion matches have been made through Tinder.
One of Tinder’s most outstanding features for me would be the sending of only text messages on the app, which gets rid of unwanted ‘surprises’. Apart from that, your personal preferences - age, gender, height - can be keyed in and an algorithm will help sieve out profiles based on that.
A facebook profile and short bio is all that’s needed to join, and there is no limit to the number of ‘matches’ you can have in a day.