The FDA has previously warned that the ECG app is only "for information purposes only" and "should not be used by people under the age of 22." The regulator also noted that the user should not take "clinical action" solely on the device's data readings, and should always consult a qualified healthcare professional.
Some medical experts have also said that Apple Watch users can draw fake positives from the app, resulting in unnecessary trips to the doctors or even ER. Apple has today repeated FDA's warnings to The Verge and adds that the features are not diagnostic tools. The company has also recently extended the Apple Watch return period, from two weeks to 45 days, but only to problems with cardiac functions.
Currently, the ECG feature is only available in the United States and will be rolled out through WatchOS 5.1
Update 12/6/18 8:10 ET ET : Verge has since drawn its article with details about the upcoming update. Our story refers to this report remaining.