FitBit Charge

Fitness trackers are all the rage lately, and FitBit is the original. In fact, products in this market can pretty much be divided into two categories: FitBits, and FitBit wannabes. This little puppy can track heart rate, step count, calories burned, distance walked, and more. Some FitBits even come with sleep tracking capability. In others words, this thing is pretty much Jarvis for your metabolism.