Online gaming platform Roblox said that Apple's App Store offers privacy and safety benefits to its users, supporting the iPhone-maker's bid to beat an appeal by Epic Games in a key US competition case.
Epic, known for its "Fortnite" game, largely lost a trial last year over whether Apple's fees and payment rules for app makers were anti-competitive.
It appealed in the 9th US Circuit Court of Appeals.
"Apple's process for review and approval of apps available on the App Store enhances safety and security, and provides those apps greater legitimacy in the eyes of users," Roblox said in a legal filing.
Roblox had played a prominent role in the original trial last year.
The Department of Justice is probing key revelations from the antitrust trial between Apple and Epic Games.
The "Fortnite" maker had argued that Apple had given a free pass to Roblox, whose app lets people pick from a selection of games to play.
An Apple senior director described Roblox's offering as "experiences". Soon after, Roblox changed descriptions on its website to "experiences" from "games" and called itself a metaverse company.
Apple has said its rules promote several benefits for consumers, including increased security and privacy.
The appeal hearing is expected next year.
