Tinder is a location-based social search mobile app that facilitates communication between mutually interested users, allowing matched users to chat.
If two users like each other it then results in a "match" and they are able to chat within the app.
In March 2015, Tinder announced the public release of its paid service, Tinder Plus, a feature allowing unlimited matches, whereas the free Tinder app limits the number of right swipes in a 12-hour period.
The selections a user makes are not known to other users, unless two individuals swipe right on each other's profiles.
However, once you have matches on the app, you were able to send "Tinder Moments" to each of a user's matches at once, allowing each match to like or not like the photos.
Rad and Mateen had known each other since they were fourteen.