It has been a year that Apple Watch on the market. It is unlike iPhone or iPad, Apple Watch is newly brand for Apple. It suprised that this wearable plays an important role users daily life.

Different people have different opinions about the understanding and application of Apple Watch. Most of people are awared of its health feature which is applied most.

It is a type of fitness product. Apple Watch could access to some places that iPhone can not due to the wearability. It sounds fantastic to the users as Apple Watch has experienced much with them.

It was reported that Apple Watch saved the life of a 64-year-old senior . There were also some similarstories after that.

A 62-year-old construction worker, Dennis Anselm who is from Edmonton, Canada felt sick last August, and Apple Watch checked his heart rate reached 210 times per minute. He went to the hospital for a body check immediately and did related operation.

A student who is from Tennessee and suffered QT before. He felt uncomfortable someday when he was alone at home. He checked Apple Watch and found his heart rate went to 138 times per minute. He was diagnosed as atrial fibrillation.

Apple Watch gave them extra suprise. It provides the ordinary daily data support which is concerned by its users. That is the significant feature of Apple Watch.

Apple Watch applies the blue LED light to work with photoreceptor to test the blood flow. The more blood flow it goes, the more LED absords and fewer heart rate interval. What’s more, Apple Watch’s heart rate sensor could increase LED brightness and sampling frequency.