When you purchase iPhone applications from the App Store or iTunes music store or songs, you must be connected to the network can be. Networking not only download items purchased for you and your credit card or in the iTunes account balance will be deducted amount. But now Apple patent shows future of App Store support offline purchase, Apple will be stored on the device itself balances of iTunes, then these balances can be purchased offline application, when you have a network connection, then spend money to synchronize with the server.
So you will be asked, how can my payment application download already purchased it? In the patent application, Apple introduced some concept local to the application cache to your device automatically, these cached application will not be used, and when you're after local payments, these restrictions will be lifted.
Apple says on the App Store can be any of the content that contains the meta data in cache to your device. This will allow you to browse and discover new applications in the offline state. And when you are offline when you purchased the application cache, you can immediately use the application.
