Tinder is a location-based social search mobile app that facilitates communication between mutually interested users, allowing matched users to chat.
The app is most commonly used as a dating app or hookup app, Tinder is among the first "swiping apps", whose users employ a swiping motion to choose photos of other users, swiping right for potentially good matches and swiping left on a photo to move to the next one.
It has met with controversy over limiting the number of "likes" a free user can give in a certain amount of time, as well as charging prices for different age groups.
As of late 2014, an estimated 50 million people use the app every month with an average of 12 million matches per day.
The site also has verified profiles for public figures, so that celebrities and other public figures can verify they are who they are when using the app.
Instead of swiping right for a profile, the user swipes up.
After transitioning from the clicking function Tinder initially used, Tinder became the first "swipe app", now a term to describe various apps that use swiping left or right to control what content the user sees in a browsing fashion.
Companion apps were being developed by different companies allowing users to, for example, use the user's heart rate to determine which direction to swipe instead of the user swiping with their hands.
Initially, instead of a swiping motion, users would click on either a green "heart" or red "o Xo" to select or move on from the photos shown.
As of October 2014, the app was processing over one billion swipes per day, producing about twelve million matches per day.
The average user would generally spend about an hour and a half on the app each day.
Using Facebook, Tinder is able to build a user profile with photos that have already been uploaded.
Basic information is gathered and the users' social graph is analyzed.
The app notifies the user if they have been Super Liked with a blue border that surrounds the profile of the person who Super Liked them.