Bed Scales is a fitness gadget, which works while you sleep.Just put four pads under the legs of your bed and it will measure your weight every night deducting weight of bed. It also track position of your sleep and mail you advice for better sleep as well as tips on diet and exercise. It also keep track on when and how user slept well. It’s totally non-invasive, there are no wires, straps, or devices to wear