Vole, which once saved Apple from extinction, filed an amicus brief supporting Epic Games in its appeal against Apple, and argues that, "the potential antitrust issues stretch far beyond gaming."

Epic Games continues to file its appeal against the 2021 ruling that chiefly favoured Apple, interested parties have been contributing supporting filings to the court.

Notably, those have included US attorneys general, but now Vole has joined in on the side of Epic Games.

Microsoft's amicus filing included below, sets out what it describes as its own "unique -- and balanced -- perspective to the legal, economic, and technological issues this case implicates."

As a firm which, like Apple, sells both hardware and software, Microsoft says it "has an interest" in supporting antitrust law. Describing what it calls Apple's "extraordinary gatekeeper power," Microsoft joins Epic Games in criticising alleged errors in the original trial judge's conclusions.

"Online commerce and interpersonal connection funnels significantly, and sometimes predominantly, through iOS devices," says Microsoft.

"Few companies, perhaps none since AT&T at the height of its telephone monopoly, have controlled the pipe through which such an enormous range of economic activity flows."

To support its claim that the Epic Games vs Apple ruling has "potential antitrust issues [that] stretch far beyond gaming,"

Microsoft describes what else it sees as this "enormous range of economic activity."

"Beyond app distribution and in-app payment solutions - the adjacent markets directly at issue in this case," says Microsoft's filing.

"Apple offers mobile payments, music, movies and television, advertising, games, health tracking, web browsing, messaging, video chat, news, cloud storage, e-books, smart-home devices, wearables, and more besides."