Microsoft Corporation (NASDAQ:MSFT) has announced that the downloads for Microsoft’s Office for iPad hit the 12 million download mark in only one week. The Microsoft Office app for iPad is free to download, but it has in-app purchases so it hit the top grossing list of apps. The suite of apps includes Microsoft Word, Microsoft Excel, Microsoft PowerPoint, and Microsoft OneNote. The free version of the apps lets users open and view files. The Office 365 subscription lets you create and edit documents.