Iam shating my experiance and opinion about happn app. This app is used for making friends from unknown areas. We can add activities on this app and we can give like to others. By liking and supporting their activities we can chat with them. But I dont think that that the id's in this app is original. I think they are fake. Voncept of this app is good, it provide you feature to like and support other's activities and its functions are average. Its layout and design are good. Surely it did not give you any use, you can only make fake friends.