Xcode Developer Tools
Xcode is the complete toolset for creating apps for Mac, iPad, iPhone, and iPod touch. Download Xcode and enable your apps for iCloud.
iCloud Web Tools
Debug your iOS apps and Mac apps that use iCloud document storage. Sign in to developer.icloud.com and view the content your app has stored in iCloud.
(iOS Developer Program or Mac Developer Program membership required)
Set up on iOS
Update your iOS device to iOS 7 wirelessly or with iTunes on your computer. Learn more
Set up on Mac
OS X Mavericks is available for free on the Mac App Store.
Set up on Windows
To enable iCloud on your Windows PC, install iCloud Control Panel 3.0 for Windows. Learn more