Apple Inc is facing an antitrust complaint in China after a law firm representing dozens of Chinese app developers filed a case to regulators, alleging that the United States tech giant is misusing its market dominance to mistreat local developers.

The case is the first time that Apple has been accused of monopolistic and anticompetitive behaviors in China, its biggest source of app revenue.

The Beijing-based law firm Dare & Sure, which represents 28 app developers, said it has lodged official complaints with the National Development and Reform Commission and the State Administration for Industry and Commerce, the country's top two regulators, alleging that Apple is abusing its control of the iOS app store to treat Chinese developers unfairly.