Today, with the release of watchOS 5.1.2, Apple has shipped the ECG app. As we explained in the MacStories Series 4 overview, the ECG functionality is enabled by new hardware including a new titanium electrode built into the Digital Crown.
Apple’s ECG sensor is notable because it’s the first of its kind available over the counter to consumers. ECG results taken with the Apple Watch are stored in the Health app, from which they can be exported as a PDF for sharing with your physician.
You folks lucky enough to have an Apple Watch 4 should let us know what you think about this app.