AR Fit Lens is a conceptual design based on Magic Leap's future AR technology. When the users put those lenses on, their physical measurements such as heartbeat, weight, work-out duration, etc. are sensed and recorded. As a result, users can check their performances and their lenses can notify users visually. Moreover, the Fit lenses are connected to other lenses such that they can motivate the users by comparing the performances of them with those of their friends and families.