Rad and Mateen had known each other since they were fourteen.
They later attended USC together and entered the Internet entrepreneurship field.
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.
The main companion site for Tinder has been Facebook, as Tinder users connect their Facebook profile to their Tinder accounts for verification and profile details.
Originally incubated inside Hatch Labs, the app was launched in 2012, and by 2014 it was registering about one billion "swipes" per day.
Tinder is among the first "swiping apps", where the user uses a swiping motion to choose between the photos of other users: swiping right for potentially good matches and swiping left on a photo to move to the next one.
Rad has stated that the impetus for the app was his observation that "no matter who you are, you feel more comfortable approaching somebody if you know they want you to approach them." He believed that a "double opt-in" system could be created to potentially alleviate that stress.
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.Tinder is a location-based social search service application (using Facebook) that facilitates communication between mutually interested users, allowing matched users to chat.The app is commonly used as a dating services app, and has branched out to provide more services, making it more of a general social media application.
By May 2013, Tinder was one of the top 25 social networking apps available on the web based on frequency of use and number of users.
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.