Top 150 free iPhone apps Check the list to find out if there’s an app for that, and, if so, the app is free. Related The Business Insider 29 million people use the Facebook iPhone app. By Ragan StaffJan. 25, 2011 SHARE Ragan Insider Premium Content To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.