Microsoft took another step to bringing one of the apps to the iPhone that has long been missing, Microsoft Office.

Today Microsoft released Office Mobile for iPhone in the iTunes Store. However while it's a free download, Office Mobile for iPhone will only work for subscribers to Microsoft's Office 365 Home Premium and ProPlus service and it is optimised for the iPhone, not the iPad.

With only 1 million subscribes to Office 365 the release of this app will have a limited impact to the 350+ million iPhone users out there. Maybe this app will help boost subscribers to Office 365, or maybe this may lead to fully functional standalone Office solution on the iPhone in the future. Only time will tell.