Stealth Fitness is behind a clever plank board that combines with your phone to gamify workouts. The Stealth Squat Trainer is their latest product that aims to gamify squats. You will be able to track your progress on your phone and keep up with others while climbing the leaderboard.
This iPhone compatible squat trainer comes with Tether Tension technology that allows you to perform squats, pulses and twists. It works with a wide variety of smartphone models. It has soft grip ergonomic handles for a comfortable workout. It can be attached to any door.[where to get it]