In case you missed last week's deal, select FitBit items are once again on sale for $50 off. Today, save on its Alta, Ionic, and Ace models. The wearable devices track your steps, calories, and sleep health. Unlike the Apple Watch, most FitBits boast a 5-day battery life. 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.