April 29 (UPI) -- The European Commission ruled on Monday that Apple's iPadOS, which is used as the operating system for its tablets, is a gatekeeper under the Digital Markets Act and now must comply with its new strict rules. The commission has given Apple six months to get the iPadOS into compliance. A statement by the commission said the operating system's business user numbers exceed its quantitative threshold "elevenfold" while end-user numbers were close but expected to rise.