갑분런 is a lifestyle app designed for iPhone users who enjoy running with others. It caters to individuals who may feel hesitant to join running crews or gather friends for a jog. The app encourages spontaneous group runs, allowing users to participate in activities that suit their preferences, from light jogging to high-intensity interval training.

Key features include the ability to search for runs based on location, time, and distance, with participation options available through first-come, first-served or leader-approved methods. Users can also view planned routes on a map to estimate distance and duration. Additional functionalities allow users to manage their running events, communicate with fellow participants, and track their running history through a personalized profile.