WHY APPLE WATCH SERIES 10 Bigger display with up to 30 percent more screen area. A thinner, lighter, and more comfortable design. Advanced health and fitness features provide invaluable insights. Safety features connect you to help when you need it. Faster charging gives you 80 percent battery in about 30 minutes. ADVANCED HEALTH INSIGHTS Take an ECG anytime. Get notifications if you have high or low heart rate or an irregular heart rhythm. Understand your menstrual cycle and get retrospective ovulation estimates. See overnight health metrics like heart rate, respiratory rate, and more with the Vitals app. Track sleep and get notifications if signs of sleep apnea are detected.