3F GYM is a lifestyle app available on the iPhone platform. Developed by Full Force Fitness, this free app offers users the ability to purchase 3F GYM memberships, book Calisthenics or CrossFit classes, and access information on various classes. With 3F GYM, users can conveniently manage their gym memberships and class schedules all in one place.

The app's features include a user-friendly interface for easy navigation, secure payment options for membership purchases, and a detailed class schedule with up-to-date information on available classes. Whether you're into Calisthenics or CrossFit, 3F GYM provides a seamless experience for users looking to stay fit and organized.