Series 7 is the most durable Apple Watch ever built, with an even more crack-resistant front crystal. The largest, most advanced Always-On Retina display yet makes everything you do with your Apple Watch Series 7 bigger and better. Stay centred. Move ahead. Taking a moment throughout the day to pause and breathe can reduce stress. The Apple Watch Series 7 delivers powerful health features on your wrist.nAn advanced sensor and app to measure blood oxygen levels. The ability to take an ECG anytime. High and low heart rate and irregular heart rhythm notifications. Apple Watch Series 7 delivers powerful health features on your wrist.nThe future of health essentials health insights in sight. Track dozens of workouts, including new tai chi and Pilates. Experience Apple Fitness, featuring world-class workouts from the world's top trainers. Close your Activity rings when you hit your personal daily goals.nAcross the system, buttons have been redesigned to take advantage of the larger dis.