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.

Judge James Donato issued his final ruling on the Epic v. Google case, deeming Google Play Store an illegal monopoly. Donato's ruling highlighted several changes that need to be made, including opening the Google Play Store to third-party app stores for three years.

A federal judge has ordered Google to tear down the digital walls shielding its Android app store from competition.