After installing iOS 12.2, some Apple Watch Series 4 owners in the UK are seeing new ECG screens that suggest ECG functionality will expand to the Apple Watch in the country when watchOS 5.2 is released.
MacRumors readers Sam and Chris have seen ECG setup screens in the Apple Watch and Health apps on the iPhone after installing iOS 12.2. The app is not, however, available on the Apple Watch in the UK right now because Apple hasn't yet released watchOS 5.2, which is likely required for the feature to work.
There's new documentation in the Health app in iOS 12.2 under ECG's "Instructions for Use" that also hints at upcoming support for the UK and other European countries:
For US Regions: The ECG app is available on Apple Watch Series 4 with watchOS 5.1.2 or later, paired with iPhone 5s or later or iOS 12.1.1 or later.
For non-US regions: The ECG app is available on Apple Watch Series 4 with watchOS 5.2 paired with iPhone 5s or iOS 12.2 or later.
There's also a new CE mark for the ECG feature in iOS 12.2 in the same document, which, as 9to5Mac points out, indicates that Apple may be planning to expand ECG functionality to all European Economic Area countries that use the CE certification mark.
It's not yet clear when Apple will launch watchOS 5.2, but with iOS 12.2 already available, it could be coming in the near future. Apple has not updated the list of countries where ECG features are available, but it could be changed once watchOS 5.2 sees a release.
Wednesday April 16, 2025 11:28 am PDT by Joe Rossignol
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Below, we recap key changes rumored for the iPhone 17 Pro models as of April 2025:
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