Tim Cook increasingly counts on Apple's App Store fees. Will a US court ruling in a case with Epic Games reshape the tech giant's revenue model?

Last week a federal judge issued a scathing ruling over Apple’s handling of fees for in-app transactions. As promised, Apple has appealed the latest decision in the protracted lawsuit brought by Epic Games over the company’s anti-competitive App Store policies.

A federal judge has found that Apple violated a court injunction in an antitrust case filed by Fortnite maker Epic Games.