| Measure your blood oxygen with an all-new sensor and app 1• 3 It's the ultimate device for a healthier, more active, more connected life | Wireless service plan is required for mobile service |
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| See for additional setup instructions | Blood Oxygen app measurements are not intended for medical use, including self-diagnosis or consultation with a doctor, and are only designed for general fitness and wellness purposes |
Built-in compass and real-time elevation readings• 5GHz Wi-Fi and U1 Ultra-Wideband chip• Check your heart rhythm with the ECG app 2• International roaming is not supported.
| For a list of supported countries and regions, see | Sync and stream music and podcasts 5• Emergency SOS lets you get help from your wrist 6• Appropriate for shallow-water activities like swimming |
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| 1 Take an ECG from your wrist | The ECG app is available on Apple Watch Series 4 or later |
International emergency calling from your watch 7• Track your daily activity on Apple Watch and see your trends in the Fitness app on iPhone• Contact your service provider for more details.
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