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.

Just a month and a half after publisher Epic Games moved to make its games, including Fortnite, available on third-party app stores, it's now suing tech giants Samsung and Google over access to those storefronts.

"Fortnite" maker Epic Games accused Google and Samsung of their methods to protect Google Play Store from competition. What did the two firms say about this?