Smart scales are advanced weighing devices that not only measure your weight but also provide additional health metrics. They often connect to your smartphone or tablet via Bluetooth or Wi-Fi, allowing you to track your progress over time. Many smart scales can measure body fat percentage, muscle mass, and water weight, giving you a more comprehensive view of your health. These scales typically use bioelectrical impedance analysis (BIA) to gather data about your body composition. Users can create profiles for multiple individuals, making them suitable for families. Popular brands include Withings, Fitbit, and Garmin, each offering unique features and compatibility with various health apps.