About Incorporating iCloud Into Your App iCloud is a free
service that lets users access their personal content on all
their devices—wirelessly and automatically via Apple ID. iCloud
does this by combining network-based storage with dedicated
APIs, supported by full integration with the operating system.
Apple provides server infrastructure, backup, and user accounts,
so you can focus on building great iCloud-enabled apps. The core
idea behind iCloud is to eliminate explicit synchronization
between devices. A user never needs to think about syncing and
your app never interacts directly with iCloud servers. When you
adopt iCloud storage APIs as described in this document, changes
appear automatically on all the devices attached to an iCloud
account. Your users get safe, consistent, and transparent access
to their personal content everywhere. At a Glance iCloud is all
about content, so your integration effort focuses on the model
layer of your app. Because instances of your app running on a
user’s other devices