I both love and loathe Microsoft Word\u2019s Track Changes feature.\n\tI love it because I can quickly see what my editor or other collaborators have done to my deadly deathless prose. And I can accept or reject each change individually or all at once. But when a lot of changes have been made, a document becomes virtually unreadable, making the Track Changes feature more aggravating than helpful.\n\tRegardless of how you feel about it, Track Changes is an essential tool for many professionals. Unfortunately, most Office-compatible mobile apps don\u2019t support the feature. For example, one of my favorite Word-compatible text-document apps, Apple\u2019s Pages, completely ignores Track Changes.\n\tThere is good news, however. Office\u00b2, which lets you create and edit Word, Excel and PowerPoint-compatible files, recently added support for Track Changes. The app is $6 for iPhone and iPod touch, and the iPad version, Office\u00b2 HD, costs $8.\n\tIn my iPad tests, Office\u00b2\u2019sTrack Changes feature works well. You can accept or reject each change or accept or reject all changes. The app lets you view documents in one of four ways: original (to see the original document without changes); original with markup; final; and final with markup. An author setting lets you see who made specific changes.\n\tOffice\u00b2 is a powerful suite of productivity apps that supports lots of other Office features as well. You can freeze panes in Excel spreadsheets, use shapes and floating text boxes in Word files and revert to any of the previous 10 file versions. Its PowerPoint-compatible features are a bit skimpy, however.\n\tOffice\u00b2 isn\u2019t your only Track-Changes option on mobile devices. OnLive Desktop, CloudOn and nivio each make desktop versions of Office available on Android and iOS devices, including Word and its Track Changes feature. For more about these apps, read \u201c3 Ways to Get Microsoft Office on Your iPad, Android Tablet.\u201d\n\tDocuments To Go, an Office\u00b2 competitor, supports Track Changes in the "full version" of its $15 Android app, but the iOS Documents To Go apps do not currently support the feature. Quickoffice, which Google recently acquired, doesn\u2019t currently offer Track Changes in its various iOS and iPad apps, either.\n\tIf you live in a world of Track Changes, as I do, Office\u00b2 is well worth its cheap affordable price.