You can now download mobile apps for both Docs and Sheets (a mobile app for Slides is coming soon). Download the apps from Google Play (Docs, Sheets) or the iTunes App Store (Docs, Sheets). Open the new app and you'll find your most recently edited files. Offline support is built in to the new mobile apps, so you'll be able to view, edit, and create without an internet connection! For more information, see The Official Update from the Google Apps team.