While it’s turned on, it automatically keeps users from installing apps unless they come from “authorized sources” — namely, Google and Samsung’s app stores. Epic claims there’s no process for any rival store to become “authorized.

Video game maker Epic Games sued Google and Samsung on Monday, accusing the tech companies of coordinating to block third-party competition in application distribution on Samsung devices. At issue is Samsung's “Auto Blocker” feature,

The “Fortnite” maker claims the tech giants colluded to place onerous restrictions on app stores created after Google lost an antitrust case.