With the FoulPlay app, you are the referee for those around you! If someone commits a “social foul” give ‘em a card. If you think a call should have gone another way in a sporting event, throw a card. Simply select a card type (Yellow or Red) and pick one of the fun noises to play and then throw your hand up in the air just as if you were giving an actual card and watch those around you come to a surprised halt as the card appears and the noise plays.