Judge James Donato, who presided over the Epic vs. Google lawsuit that declared Google to be operating an illegal monopoly with its Google Play Store on Android last year, issued a final ruling on Monday requiring the company's mobile operating system to open up to third-party app stores for three years. Google says it'll appeal the decision.

A federal judge on Monday ordered Google to tear down the digital walls shielding its Android app store from competition as a punishment for maintaining an illegal monopoly that helped expand the company’s internet empire.