NEW YORK (Kyodo) Sony Corp. said Tuesday Apple Inc. has rejected its e-book software application for its iPhone enabling customers to buy and read digital books from its online Reader Store.

The move came as the U.S. electronics giant apparently saw a problem with Sony not selling e-books through Apple's payment method, which gives Apple a 30 percent cut of the transactions.

Sony said Apple has changed the way it enforces its rules for application developers. However, according to local media, Apple claims it has not changed anything, but just wants to make sure its customers buy products under its payment method.

Books bought from the Sony Reader Store can still be read on other devices, including Sony's Reader and smart phones installed with Google Inc.'s Android operating system.