A network computing system implements a health service comprising a health trivia game and connects, over one or more wireless networks, with the computing devices of users of the health service. The network computing system provides sequences of topical health questions and receives corresponding sequences of responses from the users. Based on a correctness of each response, the network computing system determines a predicted health outcome of a respective user of the health service, and generates a health report that is accessible via a user interface of the health trivia game.