Habitica is a productivity app designed like a role-playing game to help users build and maintain habits. Users create avatars and earn rewards for completing tasks, turning productivity into a game-like experience. Tasks can be categorized as Habits, Dailies, and To-Dos, each with adjustable difficulty and recurrence settings. Users can join guilds, participate in challenges, and form parties to collaborate and compete with friends. Completing tasks earns experience points (XP) and gold, which can be used to level up and purchase in-game items like equipment and pets.