Apple Inc. submitted arguments to the Ninth Circuit Court of Appeals last Thursday, arguing in a 135-page brief that the district court correctly decided most of the case below except its ruling as to California's Unfair Competition Law (UCL) that found certain third-party app developer guidelines unfair. The filing attacked Epic Games Inc.'s appeal as "dangerously unmoored from established law and irreconcilable with the district court's factual findings." The 2020 antitrust case brought by sole plaintiff Epic, maker of the hugely popular video game Fortnite, argued that Apple is a monopolist in the market for the distribution of iOS mobile applications and accordingly, charges supracompetitive prices for apps sold in its Apple App Store by assessing developers a 30% commission. After a 16-day bench trial, the court issued a ruling largely siding with Apple. The parties cross-appealed.