Apple has submitted its initial legal response to the US Department of Justice's antitrust lawsuit accusing it of a "smartphone monopoly". The government's lawsuit focuses on Apple's restrictions on third parties in five specific areas: "Super apps", Cloud-streaming games, Messaging apps, Smartwatches, and Digital wallets. Apple contends that it allows third parties to offer all five on its platforms. Apple also calls out what it says are unfair or arbitrary metrics used to support the claim of a monopoly: measuring market share of "performance smartphones", and measuring by revenue instead of units sold.