If you are subscribing to Microsoft Office 365, Office Mobile will be available on iPhone & iPod Touch from the Apple App Store in the next five days. Office Mobile will enable iOS users to access, view, and edit their Office documents on the go, similar to the pre-installed versions on all Windows Phone 8 devices. It is completely optimised for the iPhone screen, and has full integration with documents stored in SkyDrive.
Office Mobile is a free app to download, and requires an Office 365 subscription to activate. After signing in with your Office 365 account, you will be able to view and edit Microsoft Word, Excel and PowerPoint documents on-the-go.