Apple Watch SE Key feature bullets · Take calls and reply to texts, right from your wrist · Up to 20% faster than the previous Apple Watch SE · Advanced safety features, including Fall Detection, Emergency SOS, and Crash Detection · Track your daily activity on Apple Watch, and see your trends in the Fitness app on iPhone · Enhanced Workout app with more advanced ways to train · Get high and low heart rate and irregular rhythm notifications · Listen to your favorite music, podcasts, and audiobooks · Swimproof design · Sleep stages tracking lets you see how much time you spend in REM, core, and deep sleep · watchOS 9 features an enhanced Workout app, a new Medications app, sleep stages, and greater insights into heart health