Today only, save $50 on select FitBit fitness trackers like the Alta, Ionic, and Ace models. The wearable devices track your steps, calories, and sleep health. Unlike the Apple Watch, most FitBits brag a 5-day battery life. While you might not get a ton of information on the FitBit's screen, you can pair it with your smartphone or computer to set goals and get more detailed information about your daily activity performance. Prices range from $79 to $280, depending on the model.