Apple CFO Peter Oppenheimer in Apple's earnings in first quarter 2012 iCloud announced that his company's services has attracted 125 million users within six months after launch. Two months ago Apple CEO Tim Cook announced that iCloud has touched 100 million users.
This growth could be due to the number of devices Apple sold from January to March, with 35.1 million iPhones and 12 million iPad sold at that time. But Oppenheimer did not say how many users iCloud which is a paid user of the majority of users are getting a free 5GB storage. To be sure Apple will face competition from Google's recently launched Google Drive, and of previous competitors such as SkyDrive and DropBox.