The US Supreme Court denied Google's request to block a lower court's order requiring significant changes to its Android app store, aimed at increasing competition. Google must comply with the order by October 22, which mandates access for competitors to its app inventory. Google argues this could expose users to security risks and claims it is being unfairly turned into a supplier for rivals. The changes stem from an antitrust lawsuit filed by Epic Games, which also targeted Apple's app store. Despite potential profit losses, Google continues to fight the ruling while facing other legal challenges regarding its search engine and advertising technology.