With the biggest and most advanced Always-On Retina display yet, everything on your Apple Watch Series 7 is bigger and better. Series 7 is the most durable Apple Watch ever created, with an even more shatterproof front glass. Measure oxygen levels in your blood with advanced features, take an ECG anytime, and use apps for mindfulness and sleep tracking. Plus, you can track dozens of workouts, including Tai Chi and Pilates.