Calamity Gym is a mobile fitness network that allows users to access workouts anytime on their devices and donate profits to causes. It aims to unite the fitness community globally and turn exercise into an experience that impacts lives. The document outlines how physical inactivity costs the US economy billions annually in healthcare and lost productivity. It then details various health issues that can be reduced through exercise before introducing Calamity Gym's features like custom profiles and a global exercise community. Users can choose from various workout videos and Calamity Gym donates 25% of profits to causes members support.