The Bodymedia Fit is a Bluetooth-enabled, fitness tracking band that comes in three different models. The simple elastic option is the cheapest, while a bangle-like model slots in at the highest. A new waterproof model sits between the two. Prices range from $119 to $149. The bands act as pedometers and sleep monitors. Through an iOS (only) app, the Fit can also calculate caloric input. With all of that data, the Fit will chide users to eat less or walk more based on weight loss goals.