Microsoft has released a version of its office programme Office 365 designed to be used on smartphones with the Google operating system Android.
The app was initially available only for US users through the Google Play Store but is being gradually activated in more countries.
The app allows documents from Excel, Word and PowerPoint to be viewed on mobile devices, edited in limited fashion and shared in the cloud service SkyDrive. Those who subscribe to Office 365 can download the software for free.
The Office app has been available for Apple iPhones for more than a month.