The Jehovah's Witnesses publish one official mobile application, the JW Library app. This app is available for both Android and iOS devices, and includes multiple translations of the Bible and brochures and books for studying the Bible.
Users who download the JW Library app can choose from several Bible translations and have the ability to compare different Bible versions with just a tap of a verse number. Tapping a reference letter or footnote marker lets users view related material. A history feature allows fast access to recent content, and the app lets users bookmark passages and return to them later.