Apple Watch uses green LED lights to measure your heart rate during workouts and Breathe sessions, and to calculate walking average and Heart Rate Variability (HRV). Apple Watch Series 4 and later and all models of Apple Watch Ultra also have built-in electrodes in the Digital Crown and the back of Apple Watch, which can measure the electrical Open the Settings app on your iPhone 14 Pro/Pro Max or 15 Pro/Pro Max (iOS 16.4 or later required) Choose Focus > pick an existing Focus or create a new one. Swipe down, and under Focus Filters 3 days ago · Tap Contacts. Turn the Digital Crown to scroll, choose the contact you want to call and tap the phone icon. Tap FaceTime Audio to start a FaceTime audio call or tap a phone number. If the number isn’t in your Contacts app, open the Phone App on your watch and tap keypad and manually enter the number then tap the phone icon. According to Apple, the Apple Watch Series 9 should have a big enough battery to last all day, up to 18 hours, which was the same number it gave the Series 8. This will be with normal usage, so Apple watch series 2 shuts down often even with complete charge and hard reset does mot work My apple watch series 2 has been working well recently until it started to shut down and say either it needs charge or no light will come on until it touches the charger even though the apple watchs charge is around 80 and 60 percent full . Switch on nighstand/bedside mode in the iPhone Watch app. Photo: Cult of Mac. Nightstand mode is a great Apple Watch feature, and I might even switch to using it over wearing the watch in bed. To The Series 9 is the better choice if you prioritize health features in a smartwatch and want a larger always-on display. Apple Watch Series 5. Apple Watch Series 4. If you have a Series 4 or The Series 8 comes in two sizes: 41mm and 45mm. Like the new iPhone 14 Pro or Pro Max, the Series 8 comes with an always-on display, meaning you can see the time even when your watch is inactive sXbUrNH.