Enfour delivers the largest dictionary/thesaurus combo available for the iPhone. It includes the complete and unabridged text for the second edition of the Oxford Dictionary of English and the Oxford Thesaurus of English. Like the printed edition, this version contains usage examples and word origins. Unlike the print edition, words can be searched for immediate look up and bookmarked for quick retrieval. In addition, a running history of the words you look up is automatically saved for quick access in the future. The app also includes 44,000 pre-recorded sound files. Everything is self-contained and no Internet connection is required.