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First of all, the newSamsungSmart watches are capable of drawing ECGs and are pre-installed with specialized ECG applications. This feature allows users to track their heart rhythm with a comfortable wrist and detect any possible serious disease symptoms.
Second, the device supports fall detection, which has been introduced on the Apple Watch Series 4. Whenever the device detects that the wearer has fallen, it will send a notification on the screen and can automatically call the emergency service or selected contact for assistance. Several other smartwatch manufacturers are also working on drop detection, including Mobvoi's TicWatch lineup.
Finally, Galaxy Watch Active 2 supports atrial fibrillation monitoring, which is already available on the Apple Watch Series 4. The device monitors your heart activity and generates warnings.
However, all of the above three functions need to be approved by the regulatory authorities, and Apple Watch Series 4 is also coming. In other words, Samsung needs to pass the approval of the national/regional regulatory authorities before the official launch of this feature, so the specific launch time depends largely on the approval time.