Apple’s EU antitrust case takes aim at App Store limits on Microsoft and Facebook gaming apps

Facebook and Microsoft’s grievances over how their gaming apps appear on Apple’s App Store may feed into an EU investigation into the iPhone maker’s business, as EU antitrust regulators said such concerns are on their radar. The European Commission in June opened four probes into Apple, three of which are into its App Store and its restrictive rules, including requirements that app developers use its own in-app purchasing system. U.S. social media giant Facebook and Microsoft are the latest companies to voice concerns about the rules, which have drawn criticism from app developers who say they create an uneven playing field to compete with the iPhone maker.