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Dark tattoos may interfere with the Apple Watch’s ability to capture a
person’s heart rate, Apple has confirmed on the device’s product support
page.
“Permanent or temporary changes to your skin, such as some tattoos, 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,” Apple said.
Some watch functions require direct contact with the skin to work. If the device can’t detect a pulse, it assumes it isn’t being worn, shutting downs apps and requiring people to enter their passcode. Turning off the wrist-detection function solves the issue, but prevents people from using Apple Pay.
“Permanent or temporary changes to your skin, such as some tattoos, 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,” Apple said.
Some watch functions require direct contact with the skin to work. If the device can’t detect a pulse, it assumes it isn’t being worn, shutting downs apps and requiring people to enter their passcode. Turning off the wrist-detection function solves the issue, but prevents people from using Apple Pay.
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