I was referring to the legal concept of monopoly, of which they have non, and Microsoft does (and was in fact, convicted for abusing it, independently in the US and in the EU).
(The kind of monopoly Apple has on the appstore, much like the Sony monopoly on the playstation, and Microsoft on the Xbox, is not AFAIK an antitrust target because non of them command a significant part of a market without alternatives; whereas Windows on a PC was an antitrust target because it does have that hold on a market, AND microsoft abused it to enter other markets).
(The kind of monopoly Apple has on the appstore, much like the Sony monopoly on the playstation, and Microsoft on the Xbox, is not AFAIK an antitrust target because non of them command a significant part of a market without alternatives; whereas Windows on a PC was an antitrust target because it does have that hold on a market, AND microsoft abused it to enter other markets).