Consumers can pursue a lawsuit complaining that iPhone apps cost too much, the Supreme Court ruled on Monday, adding to Apple’s woes that already include falling iPhone sales and a European investigation. The lawsuit could have major implications for the tech giant’s handling of the more than 2 million apps in Apple’s App Store, where users get much of the software for their smartphones. While most of those apps are free to download, some impose fees for people to use the software and subscribe to the services. In those cases, Apple charges a commission of 30%, a practice that the lawsuit contends unfairly drives up the price for the apps. Justice Brett Kavanaugh wrote the majority opinion that agreed the antitrust lawsuit can move forward in a lower court.