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.
Instead of swiping right for a profile, the user swipes up.
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.
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.
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.
Initially, instead of a swiping motion, users would click on either a green "heart" or red "X" 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.
If two users like each other it then results in a "match" and they are able to chat within the app.