Nike Run Club appNike Sport Band and Nike Sport Loop in new colorsNew, more customizable Nike watch facesGPS model lets you take calls and reply to texts from your wristLarge Retina OLED displayUp to 2x faster processor than Series 3Track your daily activity on Apple Watch and see your trends in the Fitness app on iPhoneMeasure workouts like running, walking, cycling, yoga, swimming, and danceSwimproof design2High and low heart rate notifications and irregular heart rhythm notification3Sync your favorite music, podcasts, and audiobooksPay instantly and securely from your wrist with Apple PayBuilt-in compass and real-time elevation readingsCan detect if you’ve taken a hard fall, then automatically call emergency services for youEmergency SOS lets you get help from your wrist4WatchOS 7 with sleep tracking, cycling directions, updates to Siri, and new customizable watch facesAluminum cases