The largest, most advanced Always-on Retina display yet makes everything you do with your Apple Watch Series 7 bigger and better. Series 7 is the most durable Apple Watch ever built, with an, even more, crack-resistant front crystal. Advanced features let you measure your blood oxygen level, take an ECG anytime, and access mindfulness and sleep tracking apps. You can also track dozens of workouts, including new tai chi and pilates. With Apple Watch Nike Series 7 and the built-in Nike Run Club app, you can track your workouts and listen to Guided Runs. Listen to music from your watch for motivation. Turn on Nike Twilight Mode for enhanced visibility. And choose from exclusive Nike watch faces and bands.