“Since the Apple Watch uses your heart rate to determine whether you’re wearing it, you might not be able to use Apple Pay, receive notifications, place calls, or use certain apps if you have tattoos on your wrists,” Goldman reports. “The issue stems from the way that the Apple Watch senses your heartbeat. According to Apple, the back of the Watch rapidly flashes green and infrared light at your skin, which gets absorbed or reflected by your red blood. When your heart beats, there is more blood in your wrist, and there is less blood between beats. By sensing the timing between your heartbeats, the Apple Watch can calculate your heart rate.”
“As it turns out, solid-colored tattoos — particularly red ones — also absorb the green light and reflect red light. Black tattoos, which absorb both green and red light, can also screw up the Apple Watch’s heart rate sensor,” Goldman reports. “The Apple Watch works fine with dark-colored skin, scars and skin abrasions, which are translucent, allowing light to pass through. Tattoo ink is opaque, preventing outside light from penetrating your skin.”
Read more in the full article here.
MacDailyNews Take: Tattoos can interfere. Potential FUD alert, though, expect to possibly see some attempt by rivals, shorts, etc. to make Apple Watch seem discriminatory toward users with darker skin.