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Downloadable computer software for mobile devices that allows users to create and participate in trophy-based challenges where the winner(s) will be awarded specific prizes, create and participate in location-based challenges that will be specific for locations or all over the world, create and participate in task-based challenges that will ask users to perform specific tasks, follow and be followed by other users of the application, reply and accept challenges created by other users, collaborate with other users in creating specific challenges, and invite others to perform challenges