
In 2011 Apple introduced Siri, their virtual personal assistant, with the iPhone 4s, and two years and two versions of iOS later, including this year's iOS 7, and no public application programming interfaces (API) have been surfaced for developers. That means customers like you and me still can't use Siri with App Store apps (aside from Apple's own Apple Store app). There are likely both business and technical reasons for that...
Full story from the iMore Blog...