Do Apps Aimed at Making Gadgets Less Disruptive to Sleep Work? - Wall Street Journal

Do Apps Aimed at Making Gadgets Less Disruptive to Sleep Work?
Wall Street Journal
As more people head to bed with smartphones or tablets, there's increasing focus on the so-called blue light the devices emit. Some research shows the light may disrupt the body's biological rhythms, including a 2012 study that found reading an iPad ...