apple-wiredcom
It seems that the Apple Watch may have some problems. Watch owners with inked-up wrists have noted on Twitter and Reddit that they have had trouble getting the device to read their heartbeats. Tech news site iMore tried to replicate some of the complaints using tattooed and non-tattooed wrists. In particular, tattoos that make use of dark colours could make the heart rate monitoring feature yield faulty results. Natural skin pigments don’t seem to cause the same issue, but other things like scars might.
(photo: wired.com)