Tim Cook Defends Apple's App Store Rules, Calls Maker Of Fortnite 'Malicious'

Apple CEO Tim Cook took the witness stand on Friday and defended against accusations that Apple is an illegal monopoly that has set unfair rules to control the billions of dollars in commerce that flow through its App Store.

The trial centers on the 30% commission Apple usually charges whenever someone buys an app or purchases something inside of an app on their iPhone or iPad.

Cook, in his first-ever courtroom testimony, said customers demand a level of safety, security and privacy on iPhones. Providing that service depends on the money Apple earns from the commission, he said.

"If you were to turn app review off, you can imagine how long it would take