It is a manual method, but accurate.
First, take your phone with right hand.
Left index/middle finger, letting right wrist under the thumb side.
Or
press the left neck position.
And then Feeling the pulse to tap the heart image with your thumb.
9Apps 4.9
![국세청 홈택스 [손택스] on 9Apps](https://go.getnew.app/sg/res/jpg/f7/df/69cc2f90120ec331db2630e0f5b6-6dh.jpg?x-oss-process=style/jmq200)
