Microsoft Office Comes to iPhone

For those who subscribe to service

A surprise popped up in the iTunes Store Friday: an iPhone version of Microsoft Office.

The app has its limitations. It's free to download but only works for those who subscribe to Microsoft's Office 365 service, which costs $10 per month or $100 per year. It isn't meant for the iPad, whose larger screen would make it easier to work with documents. And it only works with the three core programs of Office: Word, Excel and PowerPoint.