Inked and irked: Apple Watch users report tattoo problems

  • By Brandon Bailey and Barbara Ortutay Associated Press
  • Friday, May 1, 2015 2:15pm
  • Business

NEW YORK — It’s an annoying problem for the unlucky few: the Apple Watch’s heart rate monitor might not work if you have a tattoo on your wrist.

Inked and irked Apple fans have dubbed the issue “TattooGate” on Twitter, complaining that they must choose between their body art and their stylish gadget. Apple, for its part, acknowledged the issue on its support website.

“Permanent or temporary changes to your skin, such as some tattoos, can also impact heart rate sensor performance,” the site reads. “The ink, pattern, and saturation of some tattoos can block light from the sensor, making it difficult to get reliable readings.”

Several watch owners complained about the problem on social media this week, even posting videos that show the watch working well on an undecorated wrist, but locking or pausing when worn on an arm with a tattoo. While the problem doesn’t occur with all tattoos, it may be more likely to affect people with dark red or black ink on the side of the wrist where they wear their watch, according to anecdotal accounts.

That was a relief for Nick Borelli, a 34-year-old marketing executive in Cleveland who has a black tattoo on the inside of his wrist — not the side where he has worn the Apple Watch. “So far it’s not been an issue,” he said. Borelli added that he likes the watch but worries the glitch could affect a large “target demographic” of young, tech-savvy people with tattoos, who are likely to be interested in the watch as a gadget and fashion accessory.

The watch tracks heart rates through a common medical technique that measures how much light is absorbed by blood. An Apple representative referred a reporter seeking comment on the issue to the company’s website, which explains “Apple Watch uses green LED lights paired with light-sensitive photodiodes to detect the amount of blood flowing through your wrist at any given moment. When your heart beats, the blood flow in your wrist — and the green light absorption — is greater.”

The same problem may affect other fitness bands that use that method. At least one tattooed owner of a Fitbit device posted a similar complaint on the Reddit online forum in January. A Fitbit representative couldn’t immediately be reached for comment.

If tattoos can interfere with the way light is absorbed through the skin, there so far doesn’t appear to be a problem with dark skin or scars. Some experts say natural skin pigmentation wouldn’t block the green light used by Apple, although researchers at the University of California, San Francisco, have found that dark skin can affect the results of blood oxygen sensors that use infrared light.

The tech industry has confronted problems with skin coloring in the past. Microsoft and Hewlett-Packard both fielded complaints several years ago about facial recognition sensors in gaming consoles and laptops that struggled to detect people with dark skin. Both companies suggested poor lighting interfered with the sensors’ ability to measure the contrast between eyes and other facial features.

As for the Apple Watch issue, some social media users have mocked it as a complaint from spoiled hipsters. Others wondered how it happened that Apple didn’t have a single designer or tester with a wrist tattoo who would have noticed the problem. Apple suggests that users who can’t get a consistent heart rate reading connect their Apple Watch wirelessly to external heart rate monitors.

This isn’t Apple’s first “-gate” problem. “Antennagate” in 2010 was a short-lived problem with the iPhone 4’s antenna design, which caused reception problems when people covered a certain spot on the antenna with their bare hand.

Though it created an uproar at the time, “Antennagate” didn’t seem to hurt the iPhone’s popularity or sour Apple’s devoted fan base — and it seems unlikely that “TattooGate” will make or break the Apple Watch.

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