Service users are also able to share photos, music, and games instantly by linking accounts via AirDrop wireless. It replaced Apple’s MobileMe service, acting as a data syncing center for email, contacts, calendars, bookmarks, notes, reminders (to-do lists), iWork documents, photos and other data.
icloud sign in is based on Amazon Web Services and Microsoft Azure. Apple signed a deal with Google to use Google Cloud Platform for some iCloud services.