Schiller floated the idea in an email to then Apple CEO Steve Jobs and head of Apple services Eddy Cue and has been revealed as part of the company's legal battle with Epic Games.

The email asked if Apple's 7030 splits will last forever.

Schiller's said: "I think someday we will see enough challenge from another platform or web based solutions to want to adjust our model."

Schiller suggests that if Apple were ever to change its fee structure, it should do so "from a position of strength rather than weakness" and floated the idea of Apple dropping its commission rate once the App Store is generating over $1 billion in annual profit.

"I know that this is controversial, I just tee it up as another way to look at the size of the business, what we want to achieve, and how we stay competitive", Schiller wrote.