Purcell, Kristen, Roger Entner, and Nichole Henderson. The Rise of Apps Culture. Washington, DC: The Pew Research Center Internet & American Life Project, 2010. At: http://pewinternet.com/~/media//Files/Reports/2010/PIP_Nielsen%20Apps%20Report.pdf.
This report summaries a national survey conducted by the Pew Internet Project among adult cell phone users about the use of apps on their cell phone. According to the report, 35% of U.S. adults have cell phones with apps, but only two-thirds of those who have apps actually use them. App users are younger, more educated and affluent than other cell phone users. App use still ranks low compared to other non-voice cell phone data applications such as taking pictures and texting.