Epic then sued Apple, prompting a courtroom drama that could shed new light on Apple’s management of its App Store.
Are there any other motives for Epic’s action?
Epic, based in North Carolina, is looking to offer an alternative app store on the iPhone.
It also wants to break free of Apple’s commissions.
What can we expect from the trial?
Both Apple chief executive Tim Cook and Epic chief executive Tim Sweeney will give evidence in a federal courtroom in Oakland, California.
Neither side wanted a jury trial, leaving the decision to US District Judge Yvonne Gonzalez Rogers, who already seems to know her ruling will probably be appealed against, given the stakes in the case.
Epic contends the iPhone has become so ingrained in society that the device and its ecosystem have turned into a monopoly Apple can exploit to unfairly enrich itself and thwart competition.
Apple claims it faces significant competition from various alternatives to video games on iPhones.
Epic has filed a separate case against Google, accusing it of illegally gouging apps through its own app store for Android devices.
Apple will also try to depict Epic as a desperate company hungry for sources of revenue beyond the aging Fortnite.
The trial is expected to last for most of this month, with a decision expected in the following weeks.