After acquiring Quickoffice over a year ago, Google has announced that the app is now free for everyone on both Android and iOS. Quickoffice lets you edit and view Microsoft Office documents — including Word, Excel, and PowerPoint files — that are stored locally on your device, and the newest versions also let you work on documents that have been saved to your Google Drive account, and create .ZIP files.

As a bonus, Google is offering an extra 10GB of Google Drive storage for two years if you install Quickoffice from Google Play by September 26th and connect it to your Google account.  a lot of free online “cloud” storage.  Although Microsoft also now provides cloud-based Office apps for Android and iOS, you need a paid Office 365 subscription to use them.

Although Quickoffice’s native Office support means that documents, spreadsheets and presentations don’t need to be converted to Google Docs files, it’s safe to assume that Google will continue to integrate the two services, and hopefully improve Google Docs formatting options in the meantime.

Quickoffice is available in both the iTunes App Store and the Google Play store.