"GoBe uses an impedance sensor to measure the fluid moving in and out of your cellscontinuously, around the clock. Healbe FLOW Technology uses an advanced algorithm to analyze impedance readings and calculate calorie intake based on your glucose curves, giving you a complete picture of your calorie and nutritional intake over time." http://www.healbe.com It seems like a natural extension of an active calorie tracker to also calculate caloric/nutritional intake. A feature like this would have blown me and many others away. Early reviews show the company's accurate within 15% claims to be true, and Apple's research labs could close that window. It is unique, breakthrough sensor/software combos like this that will make AW truly useful.