The following tables compare general and technical features for a number of iOS e-book reader software. Each section corresponds to a major area of functionality in an e-book reader software. The comparisons are based on the latest released version. Navigation features Display features Edit/tool features Book source management features Supported File Formats See Comparison of e-book formats for details on the file formats. License Special features Discontinued software The Readmill app, introduced in February 2011, read numerous formats on Android and iOS devices but shut down on July 1, 2014. Also the Blio, DL Reader and Stanza app are no longer available. See also Comparison of Android e-reader software Comparison of e-book formats - includes both device and software formats Comparison of e-readers - includes hardware e-book readers References iOS e-book reader software IOS software Ebooks