Google launched its Microsoft Office substitute, Quickoffice, for Apple's iPhone, Android smartphones and Android tablets. Google Apps for Business can already edit Microsoft Office files using Quickoffice on an iPad, and starting today they can do the same on iPhone and Android devices. From Word to Excel to Powerpoint, you can make quick edits while on the go and save and share everything in Google Drive.

In addition to bringing Quickoffice to new devices, it’s also now easier to find and use your Drive files from within the Quickoffice app. Sign in with your Google Apps for Business account and your Drive folders view will now include Shared With Me, Starred, Recent and any subfolders.

iPad and iPhone users can open and edit Office files directly from the Drive app. Just open Drive and select the file, make edits using Quickoffice and save it back to Drive.

Google Apps for Business users can download Quickoffice right now from the App Store and Google Play. The apps are available free to paying customers of Google Apps for Business, a cloud-based suite that costs $50 per user for a one-year subscription.

The search giant acquired Quickoffice in mid-2012 and rolled the firm's development team into its Google Apps group.

Microsoft, long rumored to be considering porting all or some of its Office suite to iOS and Android, and analysts believe that the company will eventually release Office for the two mobile systems.