More than a third (35%) of U.S. adults have applications or apps on their phones, yet only 24 percent of adults use those apps, according to a new report from the Pew Internet & American Life Project. Many adults who have apps on their phones, particularly older adults, do not use them, and 11 percent of cell owners are not sure if their phone has apps. Among cell phone owners, 29 percent have downloaded apps to their phones and 13 percent have paid to download apps. .