Apple-Watch-Tattoo

If you have a tattoo on your wrist, then its better that you should not buy an Apple watch. From past few days, every blog is publishing that tattoos on your wrist may affect the sensing or some functionality of Apple watch. But after the accusations, Apple finally confirmed that the device can’t sense the heart rate if user had tattoo on his watch wearing hand.

Apple wrote on its support page that if you have permanent or temporary changes to your skin, such as some tattoos, it can also impact heart rate sensor performance. The ink, pattern, and saturation of some tattoos can block light from the sensor, making it difficult to get reliable readings.

What is the exact Apple Watch and tattoo problem?

Apple watch heart-rate reading sensors works on a simple principle of photo-plethysmography. Some of you are thinking that it’s tough to even pronounce and how I am saying that it’s a simple principle. But in a way, it really has a simple explanation that your blood is red because it reflects red light and absorbs green light. So the watch will use green LED (Light Emitting Diode) with some photo-diodes (Light Detecting Diode) to detect the amount of blood flowing through your wrist. When your heart beats, the LED will absorb green Light and in between, it will remain undetected, so that will record in count and you will know your heart beat.

watch-measure-sensors

But this simple enough concept will fail in many circumstances like if your band of watch is not tight, or you are moving fast, or environment around your hand is changing frequently like you are exercising in cold. Last but not the least, the most concerning one reported by users that tattoos will interpret its sensing because the watch can’t use its detecting diode to detect the green light across the tattoos.

So final verdict is, if you want to use your Apple Watch as heart-rate sensor or any health sensing device, then you have to think twice before buying it.

What are your views about this Apple Watch’s problem with tattoos? Tell us in comments!

Also Read: Apple Watch Users Complain: “Apple Watch is Burning Our Skin”