On Wednesday, Apple and Epic Games laid out in separate dueling legal filings what they consider to be the key facts and main legal issues ahead of an antitrust trial that's scheduled to start in May.

Apple and Epic Games, best known for its game Fortnite, have been in a legal battle since last year after Epic Games tried to avoid Apple's 30% App Store fee through a server software update that skirted past Apple's App Store payments system.

Apple responded by removing Fortnite from its App Store, effectively preventing iPhone users from playing the game.