Is Apple watch accurate?

Related questions

1. Does Apple Watch know when you sleep?
2. Which Apple Watch is the best?
3. Can Apple watch measure blood pressure?
4. Is Apple watch time accurate?
5. Do you sleep with an Apple watch on?
6. Can I use an Apple watch with an iPad?
7. Can I control my iPad with my Apple Watch?
8. Can you Facetime on Apple Watch?
9. Do you need a data plan for Apple Watch?
10. Is Apple Watch Series 4 worth it?

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18. #error