Dictionary, thesaurus, how to, wiki, google, maps, Bible, Quran, translation, dictionary, formulas, area codes, states, atlas, vocabulary, guides and walkthroughs….we all need this stuff everywhere. We need these in our PC. We need these in our smart phones. So here are many of these for iPhone, iPod Touch and iPad. References and guides all you need. These are our favorite. Almost all these apps are compatible with iPhone, iPod touch, iPad and requires iOS 3.0 or later.