Google Docs, Sheets, Slides permanently replace Quickoffice

After having acquired Quickoffice, Google had made ported many of the document suite's features to its Google Drive service. As such, Google will be retiring Quickoffice and migrating users who need native document editing and creation to Drive's standalone Docs, Sheets, and Slides apps. The move will affect both iOS and Android users as Google suggests that users migrate to those apps instead.

source: androidcentral