Antitrust regulators will on Friday charge iPhone Apple (AAPL.O) with anti-competitive behaviour by not allowing developers to inform users of other purchasing options outside of apps, a person familiar with the matter said. European antitrust chief Margrethe Vestager will announce a chargesheet for Apple at 1100 GMT. Apple"s rules regarding its in-app payment system which charges a 30% commission has been the focus of Swedish music streaming service Spotify"s complaint to the European Commission. Bloomberg was the first to report on the in-app payment system issue.