iCloud stores your content, including music, photos, contacts, calendars, and supported documents. Content stored in iCloud is pushed wirelessly to your other iOS devices and computers set up with the same iCloud account.
iCloud is available on devices with iOS 5 or later, on Mac computers with OS X Lion v10.7.2 or later, and on PCs with the iCloud Control Panel for Windows (Windows 7 or Windows 8 is required).
Note: iCloud may not be available in all areas, and iCloud features may vary by area. For more information, see www.apple.com/icloud.
iCloud features include:
iTunes in the Cloud—Download previous iTunes Store music and video purchases to iPhone for free, anytime. With an iTunes Match subscription, all your music—including music you’ve imported from CDs or purchased somewhere other than iTunes Store—appears on all of your devices and can be downloaded and played, on demand. See iTunes Match.
Apps and Books—Download previous App Store and iBook Store purchases to iPhone for free, anytime.
Photos—Use My Photo Stream to push photos you take with your iPhone to your other devices, automatically. Use iCloud Photo Sharing to share photos and videos with just the people you choose, and let them add photos, videos, and comments. See iCloud Photo Sharing and My Photo Stream.
Documents in the Cloud—For iCloud-enabled apps, keep documents and app data up to date across all your devices.
Mail, Contacts, Calendars—Keep your mail contacts, calendars, notes, and reminders up to date across all your devices.
Backup—Back up iPhone to iCloud automatically when connected to power and Wi-Fi. All iCloud data and backups sent over the Internet are encrypted. See Back up iPhone.
Find My iPhone—Locate your iPhone on a map, display a message, play a sound, lock the screen, or remotely wipe the data. Find My iPhone includes Activation Lock, which requires your Apple ID and password in order to turn off Find My iPhone or erase your device. Your Apple ID and password are also required before anyone can reactivate your iPhone. See Find My iPhone.
iCloud Tabs—See the webpages you have open on your other iOS devices and OS X computers. See Share what you discover.
iCloud Keychain—Keep your passwords and credit card information up to date across all your designated devices. See iCloud Keychain.
Find My Friends—Share your location with people who are important to you. Download the free app from the App Store.
With iCloud, you get a free email account and 5 GB of storage for your mail, documents, and backups. Your purchased music, apps, TV shows, and books, as well as your photo streams, don’t count against your available space.
Sign in or create an iCloud account, and set iCloud options. Go to Settings > iCloud.
Purchase additional iCloud storage. Go to Settings > iCloud > Storage & Backup, then tap Buy More Storage or Change Storage Plan. For information about purchasing iCloud storage, see iCloud Help.
View and download previous purchases.
iTunes Store purchases: You can access your purchased songs and videos in the Music and Videos apps. Or, in iTunes Store, tap More, then tap Purchased.
App Store purchases: Go to App Store, tap Updates, then tap Purchased.
iBooks Store purchases: Go to iBooks, tap Store, then tap Purchased.
Turn on Automatic Downloads for music, apps, or books. Go to Settings > iTunes & App Stores.