Mobile users spend 1.4 times as many hours using social networking sites than reading and responding to e-mail, according to a recent study by research company TNS. On average, users spend 3.1 hours per week on social networks, versus 2.2 hours on e-mail.
Of the 82% of U.S. adults who are now active cellphone users, 43% now have apps on their phones, and more than two-thirds of them use those apps regularly. In other words, 24% of the U.S. adult population actively uses apps, the study estimates.