Measuring your weight and calculating body composition is easy. Make sure that you have set up the Actofit SmartScale with your mobile. Now switch on the Bluetooth of your mobile and open the Actofit SmartScale app. Step on your Smart scale with bare feet, and evenly distribute your weight. Make sure that your feet are making good contact with all four conductors. Once you stand on the scale the measurement animation will start. You have to stand on the scale until the measurement animation stops and all 24 or 15 (depends upon your Smartscale model) body composition parameters are displayed on the "Measurement" screen. Body composition can only be displayed if you have properly set up a user profile on your scale.