Updates for iOS:
Starting today, on your iOS device you can also edit Google documents, just as you can with the Android app. From your iPhone or iPad, you can create a new document, edit an existing one or format text. And, just like on your computer, you'll be able to see other people's edits instantly as they're made.
Updates for Android:
You can now add comments, reply to existing comments and view tables in your Google documents. And you'll have the same new abilities to view presentations and organize your stuff as your friends with iPhones do.
Google Drive for mobile