I have been looking for months to find an iPad Word app that would actually let me use my Microsoft Word documents to their fullest extent–including tracking changes. And it finally happened! According to this article it is Office² HD by by Byte². It is compatible with Google Docs, DropBox and Microsoft SkyDrive which means I don’t have to sign up for yet another service. And it has the added feature of word count.
Here is a snippet of the app’s description, but see their website for their full list of extensive features (too long for me to want to include here):
Office² HD, the most intuitive and straightforward office document editor available on the iPad, makes it easy to open, view, create and edit Word (DOC & DOCX), Excel (XLS & XLSX), and PowerPoint (PPT & PPTX) files right from your iPad!
Or watch this video to find out even more amazing features in the 5.0 version.
Moms Like To Do It, Too. 
Nice! Have you actually used it yet?? Going to go download it now!