description Apple Watch Series 9 (ECG & Blood Oxygen) Overview
Apple Watch Series 9 combines everyday smartwatch functions with health measurements for use alongside a compatible iPhone. Its ECG app records a single-lead electrocardiogram and can classify certain results, including signs of atrial fibrillation. Separate irregular-rhythm notifications use background heart-rate measurements. Blood Oxygen functionality is also associated with the model, but its availability and the way results are displayed depend on region, purchase history and software.
It suits people who want personal wellness records that can help inform a conversation with a healthcare professional. These measurements do not provide continuous medical surveillance or establish a diagnosis. The appeal is having health information available at the wrist within the Apple ecosystem. The ECG app has US FDA clearance within its stated use.
help Apple Watch Series 9 (ECG & Blood Oxygen) FAQ
Does the Apple Watch Series 9 have FDA-cleared ECG?
Yes, the Apple Watch Series 9 includes an FDA-cleared ECG app that can record a single-lead electrocardiogram and detect signs of atrial fibrillation. The feature requires the user to take a manual 30-second reading by placing a finger on the Digital Crown.
Can you still use blood oxygen on the Apple Watch Series 9?
The blood oxygen sensor is present on the Series 9 hardware, but due to a patent dispute with medical technology company Masimo, Apple was required to disable the feature on new units sold in the United States starting in early 2024. Units sold in many other countries retain full functionality.
What is the double-tap gesture on the Apple Watch Series 9?
The double-tap gesture lets you control the watch by pinching your thumb and index finger together twice, without touching the screen. It is powered by the S9 SiP and can be used to answer calls, pause music, or dismiss alarms.
What chip powers the Apple Watch Series 9?
The Series 9 runs on Apple's S9 system-in-package, which enables on-device Siri processing so voice commands work without an internet connection. The S9 chip also powers the brighter 2,000-nit display and the double-tap gesture feature.
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