After surveying more than 6,000 parents and kids, Gallup found teenagers to be spending almost 5 hours a day on average on social media apps and websites. Girls on average spend longer scrolling and posting than boys, while 17-year-olds pend almost 6 hours a day on the apps, compared to 4 hours and less for those age 13. "Teens who spend five or more hours per day on social media apps are significantly more likely to report experiencing negative emotions compared with those who spend less than two hours per day," Gallup found.