At first look you may mistake this for just another activity monitor but the Gymwatch Sensor is like having a personal trainer attached to your body, it’s not about what you ate that day or how many steps you need to take this is aimed at a more serious workout in the gym, specifically using weights. The Sensor comes with two different sizes of Velcro straps to use on either your arm or leg and has a companion app that is necessary to work alongside the Sensor as there is no screen.