A fitness tracker is a wearable electronic device designed to monitor and record various physical activities and health metrics. It typically comes in the form of a wristband or smartwatch, equipped with sensors that track movement, heart rate, and sleep patterns. These devices help users set and achieve fitness goals by providing real-time data and progress summaries. Most fitness trackers sync with smartphone apps, allowing for deeper insights and long-term tracking. Features often include step counting, calorie tracking, distance measurement, and sedentary reminders. Advanced models may offer GPS, oxygen saturation monitoring, and stress level detection. Users can customize their activity goals based on personal health objectives. Fitness trackers are popular among people seeking to maintain or improve their overall well-being. Their convenience and motivational features make them valuable companions in daily health routines.