App Store

The App Store is an application for iOS and Mac OS X. The App Store was created by Apple Inc., which allows users to browse and download applications that were developed with the iPhone SDK. The apps sold on the App Store are either free or must be purchased used cash, depending on the application. The applications are downloaded directly to the iOS device it was purchased/installed on that device/Mac, or it will be transfered to all devices under the Apple ID through iCloud. Whilst Apple has stated that they do not expect to profit from the store, it has been predicted by Piper Jaffray that the App Store could create a profitable marketplace with revenue exceeding United States dollar|US$ 1 billion dollars annually for the company. The App Store opened early in the morning on July 10, 2008 via an update to iTunes. Applications were immediately available for download at that time.

SDK
The Software Development Kit for iPhone and iPod touch was announced at the iPhone Software Roadmap event on March 6, 2008. The SDK will allow developers (running Mac OS X 10.5 or higher) to create applications, using Xcode, which will natively run on both the iPhone and iPod touch. A Beta version was released after the event, and a final version will be released in July alongside the iPhone 3G, due to be released July 11. Applications that developers create will be sold exclusively through the iTunes Store on Mac and Windows, or on the App Store on the iPhone and iPod touch. Developers will get 70% of sales and will not have to pay any distribution costs for their application other than a United States dollar|US$99 fee to use the SDK on the iPhone and upload applications to the store.

Demonstrated applications
Several applications were demonstrated at the iPhone Software Roadmap event on March 6, 2008. These included:

Several other applications were demonstrated at WWDC 2008 in the keynote presentation. These included:

Number of launched applications
As of about 2012, there are more than 500,000 apps available for download on the App Store. As of July 11, 2008, users may buy applications from the App Store, and transfer them to an iPod touch or iPhone which has the iPhone 2.0 software update, which became available through iTunes on the same day.

Most Popular Apps
Below are some of the most popular apps, Paid and Free. The most popular apps might change one day, but this list of apps is for commonly bought apps:

Free:                      Paid: 1:FaceBook                1: Angry Birds 2:Pandora Radio           2: Fruit Ninja 3:Words With Friends Free 3: Doodle Jump 4:Skype                   4: Cut the Rope 5:The Weather Channel     5: Angry Birds Seasons 6:Google Search           6: Words With Friends 7:Google Earth            7: Tiny Wings 8:Angry Birds Free        8: Angry Birds Rio 9:Shazam                  9:Pocket God 10:Netflix               10:Camera+