Apple released the watchOS 5.2.1 update, in which the ECG application became available. It can monitor heart activity as well as a single-channel ECG – but you must be at least 22 years old to use the program.
To conduct an ECG application uses electrodes in the digital crown and the back panel. When you first start the application warns that it is not able to determine heart attacks – but the symptoms of atrial fibrillation and some other abnormalities it can potentially detect. Data from the ECG application is synchronized with the Health application on the iPhone with iOS 12.1.1. Important: with the beta version of iOS, the application is not compatible, even if you have already downloaded the latest update.
It is unclear why the developers have imposed an age limit. It is not difficult to bypass it – just change the date of birth in the Health app – but we do not recommend you to do this.
Be that as it may, the ECG app is available on Apple Watch Series 4 with watchOS 5.1.2, paired with iPhone 5s or newer with iOS 12.1.1 on board. So far, this function only works on the American version of the watch – but it does not depend on the region installed on the smartphone and on the clock, so the application will run on the American Apple Watch 4 even from Russian accounts without any additional measures.
Note that the ECG readings obtained in this way require further consultation with a specialist. In the Health app on iOS, you can easily save the results to PDF to show them to your doctor.