 By using, in quotes, hidden algorithms and game-like design features, the lawsuit says Match prioritizes profits over its customers' relationship goals. Match has called the claims ridiculous and says they have zero merit, but this situation does show just how strained our relationship has become with the apps. So are these apps addictive? And what is it about them that could get people hooked? We asked a psychologist, Elias Aboujadeh, from Stanford University Medical School.