The watchOS 5.3 update also makes the ECG support available to owners of the Apple Watch Series 4 in Canada and Singapore. Unfortunately, the feature, alongside the irregular rhythm notifications, has yet to make its way here in Malaysia.
Beyond these features, it doesn’t look like watchOS 5.3 brings anything new to the Apple Watch. But if you were a frequent user of Walkie-Talkie, then maybe this update is a significant enough one for you. With watchOS 6 on the way, there’s no telling if there will be any more updates to the watchOS 5. The former is already in beta testing, and is scheduled to be released in fall, which begins on 23 September. (Source: MacRumors)
