Better rethink that wrist tattoo: The new Apple Watch doesn’t seem to work as well when worn over ink, causing the product to repeatedly pause and demand security codes from wearers. Other issues include inaccurate heart readings when the product is worn for exercise purposes. According to iMore, “Dark, solid colors seem to give the sensor the most trouble—our tests on solid black and red initially produced heart rate misreadings of up to 196 beats per minute before failing to read skin contact entirely.”
