The Apple Watch heart rate reader is generally relatively reliable – of course, it will not replace professional methods of measuring your heart rate, but it is a simple way to check how your heart is doing during the day, if your exercises are reaching the desired goals and if there is any abnormality in your daily cardiac activity.
That said, did you know that owners of Apple Watch Series 4 can you get an even more accurate reading of your heart rate? And there is no need to do any work for this, everything is set in this Apple support article: the only extra step is put your finger on Digital Crown when you have the Beats app open.
When you do this, the Apple Watch adopts another method of reading the heart rate: instead of using the infrared sensors at the bottom of the case, the watch starts capturing your beats with the electrodes present below and on the Digital Crown – the same ones used for the electrocardiogram (ECG) resource.
The practical advantages of this? Instead of updating your heart rate every five seconds, the Beats app manages to have a much more accurate reading of your heart, showing changes from second to second. When you go to check your heart rate history in the Health app, the records made by this method will be classified as “ECG” instead of the usual labels (“Exercise”, “Rest” and others).
It is good to note that, even using a component created for the ECG, the most accurate beat reading is not restricted by region – that is, you can enjoy the novelty right now, wherever you are. Just have an Apple Watch Series 4, of course.