Googles long had a Drive app for both Android and iOS, but who knows, maybe you just cant handle that many features in one program. If for some reason youre the kind of person who only wants to edit word documents and never see another spreadsheet again (not that we blame you), Google just released standalone Drive apps for Android and iOS, each with offline support built in. These include Docs and Sheets to start; a Slides app for presentations is coming too, but hasnt been released yet.