There are fitness wearables that track steps, gauge your quality of sleep and monitor your stress, but few combine all three. As for keeping track of what you eat, most people still resort to old-fashioned food diaries and calorie counters. The AIRO wristband, however, aims to measure all of the above completely automatically. Launching today, the AIRO uses a special embedded spectrometer to track not just your heart rate, but also your sleep patterns, workout intensity and calories consumed. It’s even able to break down the nutritional intake of your food.