Apple and Google have removed Fortnite from their app stores.
The move prevents people from installing one of the world’s most popular games on to their phones.
It came after Fortnite introduced an update on Thursday that let players buy in-game purchases, such as skins, at a cheaper price if they bought directly from maker Epic Games.
Apple said Epic had taken the “unfortunate step of violating the App Store guidelines”.
This new payment plan would avoid dealing with Apple and Google. They usually take a cut of up to 30% from any game’s in-app sales.
Many developers believe this 30% charge of in-app purchases is unfair.
In reply, Epic Games have said that they believe Apple and Google a monopoly. They run the operating systems of pretty much all of the phones in the world. That means they get to choose who can run apps on their stores, and who can’t. They also get to set the charges.