See how much fat you're burning just by breathing out
 

Using a weighing scale to keep track of your weight is tricky. Your body can lose water, muscle or fat but the scale simply picks up your overall weight. It doesn't reflect your gym obsession or fat loss with any accuracy. LEVL is a new portable devi...

http://www.engadget.com/2016/01/06/l...-breathalyzer/