AppStore is an application store accessed via iTunes containing various apps for iPhone smartphones, iPod Touch, iPad tablets, and also for Mac personal computers and allowing to buy them or download for free. Similar to Google Play for Android applications.
Costs for an App range from $ 0.99 to $ 9.99, and significantly more for professional software. However, most apps are distributed through the App Store for free.
The store is supervised by Apple experts. Each application is equipped with a special electronic certificate. If somebody starts to commit illegal actions with the purchased program, they will remove it from the database, and developers will be "severely reprimanded".
Revenues from sales of apps are distributed as follows - the authors receive 70%, Apple collects 30% of the share in order to maintain the store. Officially, Apple claims that they don’t intend to make money on sales. Developers also have an opportunity to release free apps. It is also interesting that all purchased programs can be registered in iTunes to download all the new updates.
In the iPod Touch, the App Store service works when you connect to the Internet via Wi-Fi. So users can buy and download apps through the wireless network from anywhere. Applications are available either for free or have a certain cost which is charged from the user's account in the iTunes Store.
The App Store will promptly notify the user about the latest updates, which happens regularly. The App Store service is available in iTunes for both Macs and personal computers, wherein apps are synchronized with the iPhone or iPod Touch via a USB interface.