Why doesn't iwatch7 have ECG standard?

AppleWatch7 supports ECG function. You can use the electrode heart rate sensor of the watch device to record the heartbeat and heart rate, and then check whether there is atrial fibrillation in the record.

The steps for installing and setting the ECG App are as follows: 1. Open the Health app on the iPhone.

2. Follow the steps on the screen. If you don't see the setting prompt, click the browse tab, and then click the heart >; Electrocardiogram >; Set up the Electrocardiogram application.

3. After setting up, open the "ECG" App to do ECG.