The highly anticipated ECG feature of the Apple Watch Series 4 is slated to be released with WatchOS 5.1.2. The news comes via MacRumors who obtained internal Apple Store training documents.
The documents state that the ECG app will available only in the United States initially as it is a regulated app. It must be cleared by local health authorities prior to being available in specific countries or regions. The FDA has approved the feature here in the United States.
Using the Digital Crown and the sensors built into the back of the Apple Watch Series 4, users will be able to take an ECG with that data stored in the Apple Health app. As part of WatchOS 5.1.2, users will also be notified of an irregular heartbeat.
According to the documents, in addition to the update to WatchOS, iOS 12.1.1 will also be required for the feature to work. Both updates are currently in beta cycle testing at the moment. WatchOS 5.1.2 entered beta earlier this month while iOS 12.1.1 was released to beta testers on October 31. If history is any indicator, these releases should happen early to mid December. Further, with these documents for Apple Store employees now existing, it also suggests that their releases can’t be far from now.
A final note on the update, and one found by MacRumors, is that the irregular hear rhythm feature will be available on all Apple Watch Series 1, 2, 3 and 4 with only the Series 4 actually having the ECG functionality.