Office_for_iPhoneToday, we're releasing Office Mobile for iPhone available at no extra charge from the Apple App Store for Office 365 Home Premium and Office 365 ProPlus subscribers. Similar to our free Office Mobile for Windows Phone that ships with every handset, the iPhone app enables great Office content viewing and on-the-go content editing capabilities.

See the Office blog at http://blogs.office.com/b/office-news/archive/2013/06/14/office-mobile-for-the-iphone-is-now-available-for-office-365-subscribers.aspx for more information.  Enjoy!