Apple has locked out the Sony Reader app from the App Store for violating its store rules policy, according to a report. The Sony Reader app has already made its debut on the Android Market and was expected to appear on the iOS platform. The reason for the rejection, according to the New York Times, is that the Sony Reader app would have directed users outside of the Apple ecosystem allowing them to purchase their content directly from Sony. According to AppleĆs App Store rules, any app that offers in-app purchases must go through the Apple Store.