The Supreme Court ruled on Apple’s pricing policy for apps on its exclusive App Store. (Photo: SASCHA STEINBACH, EPA-EFE)

WASHINGTON – The Supreme Court opened the door Monday for iPhone users to sue over excessive prices on its exclusive App Store.

Associate Justice Brett Kavanaugh wrote the 5-4 opinion and was joined by the court’s four liberal justices. The other four conservatives dissented.

The question before the justices was whether consumers’ beef over prices is with Apple directly or the app developers who pass along the tech giant’s 30 percent commission, as well as its rule that prices end in .99.

“Our cases have consistently stated that direct purchasers from alleged antitrust violators may maintain a suit against the antitrust violaters,” Kavanaugh wrote.

“Ever since Congress