According to an infographic created and sponsored by Uberflip, 81% of Americans use a smartphone and watch TV simultaneously. The biggest use of the second screen appears to be social networking, and watching TV, it’s easy enough to see networks strive to make the connection. Nearly every reality show has related hashtags flash by occasionally, encouraging viewers to weigh in on Twitter, which is the biggest driver of social TV, with 33% of users tweeting about it last June.