Back in 2010 the FCC launched an iPhone app that allowed users to test their data connection speeds. The FCC used this app to collect anonymous speed data from mobile devices. After a brief period of collecting this data, the FCC pulled the app from the App Store.
Today the app was relaunched with a new design for iOS 7 on the iPhone and iPad. The data is being used to create a map of data speeds across the country. You can also review your own data from previous speed tests sorted by connection type. You can grab the app for free on the iOS App Store.