Well...my watch doesn't track any of my sleep. I click the help button and all it says "Your watch automatically records your sleep based on your movement. If your heart rate can't be recorded, your watch will use motion to record your sleep as restless, light, or motionless" To me, that is no help at all. Besides my watch battery DOES NOT EVEN LAST A WHOLE DAY! It's at 100% when I go to sleep, wake up 8 hours later, battery percentage is at 60% or lower, and no sleep recordings on watch or phone. I have changed many settings to make battery last a whole day, nothing works and the same for my sleep recordings. Pretty bummed about this watch, it's junk. My Galaxy Watch1 is way better than this 3. Huge disappointment with Samsung. Save your money and keep onto your Galaxy Watch1 if you have it. Don't upgrade.
hello, mine watch 3 works fine. recording sleep every night, and also small naps. I get like 2,5 days of battery life, and when I charge every day fro approximately 30 minutes, while I am showering, I get like 5 days of battery, no issues there. It is an excellent device!