First of all the Office is only for iPhone users and is not extended to iPad users. Secondly Office will be only available to subscribers of its Office 365 Home Premium and ProPlus service users.
Analysts and reviewers believe that this release will have particularly limited appeal for the more than 350 million users of iPhones worldwide. That's because, as Microsoft noted last month, Office 365 has 1 million subscribers. The new app, by the way, is officially dubbed "Office Mobile for Office 365 subscribers" in the iTunes Store, but Microsoft is referring to it in press materials as Office Mobile for iPhone.
The free download Office Mobile for iPhone includes access to Word, Excel, and PowerPoint. The programs aren't meant for document, spreadsheet, and presentation creation. Rather, they are aimed at helping Office users make quick fixes to existing work, and share those files. The files, like all Office 365 documents, will sync with Microsoft's SkyDrive Web storage service. Users won't be able to store files using the app on Apple's iCloud service.
( via C|net )
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