numbers), but you can also save files as. By default, they still use iWork file extensions (.pages. These days, they can open, edit, and save files in standard Office formats. IWork apps have come a long way in their compatibility. docx files? This used to be a big count against Apple's iWork suite. Everyone else is likely to still use Office, so how will your app deal with. Using any apps other than Microsoft Office always comes with the worry of compatibility issues.
