Apple has apparently received approval for the ECG app on Apple Watch Series 4. In the Health Canada database, ECG and irregular pulse rhythm alerts are listed as approved on May 16. The listings were first discovered by iPhone in the Canada blog.
It therefore follows that Apple will soon activate the ECG app in Canada, perhaps when iOS 12.4 and watchOS 5.3 are published.
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The ECG app was first launched exclusively in the US.
Each Apple Watch Series 4 comes with the ECG hardware in the back sensor area, but the software is not limited. Because of the medical association, Apple must get government approval before it can start the electrocardiogram analysis in each region.
Apple expanded the list of countries dramatically with the release of watchOS 5.2, bringing ECG to 19 European countries. watchOS 5.2.1 continued this trend, allowing ECG features for Apple Watch customers in Croatia, the Czech Republic, Iceland, Poland and Slovakia.
Apple has said it wants to bring ECG to all series 4 Watch users around the world but have never committed to release time frames. Naturally, approval from the authorities gets a big indicator that a launch is at all.
It seems that Canadians will be able to use ECG when the next watchOS update comes out. watchOS 5.3 only entered beta last week; It will probably be sent publicly in June or July.