Quickoffice, the mobile productivity app acquired by Google last year, is now free. Quickoffice lets you create and edit Microsoft Office documents, spreadsheets, and presentations on iOS devices. Users can already integrate their Google Drive accounts for easy access to all of those files as well. Additionally, any Quickoffice user who signs in with their Google account before September 26 will get and extra 10GB of free Google Drive space. That storage will be added to applicable accounts over the next few weeks.