From only the name you can understand that it is an online dating app where two people happen to meet each other. We can not say it is a totally online dating app because its concept is a little different from others.
The app believes that the perfect match can be anywhere like it may be in the crowd of thousand people walking on the streets, it believe that when two people are crossing the path or sitting near of your table in a restaurant or cafe can be your match. And that’s exactly what for happn app is. You can find that person in the app and see that you may two have that sparkle or not.