The Korea startup forum, which represents the app developers, filed a petition with the Korean Communications Commission on Wednesday to investigate whether Apple and Google violated laws related to in app purchases. “The 30% commission itself is too high,” said Choi sung Jin, President of the alliance. But what’s more, they force developers to use specific payment systems. ” < p > < p > Apple has been forcing developers to use their specific in app purchase systems since 2011, according to the Korean start-up alliance. Through the system, apple takes about 30% commission from customers’ purchases. < / P > < p > and Google has set up in app purchase modules and commissions for each application on its platform. Of course, this approach only applies to Korean game applications. According to Choi sung Jin, this is particularly unfair to small companies because it is said that large companies may be able to negotiate commission rates. He also said Apple and Google could also decide to raise fees without consulting. < / P > < p > in fact, the current dispute between apple and Google and epic, the developer of Fortress night, also involves in app purchases. But Apple had previously defended its app store policy at an antitrust hearing.