The two asked a federal judge to issue an injunction that would stop the location tracking practice and require Apple to disable the feature in the next version of iOS, the mobile operating system that powers the iPhone and iPad. They also sought unspecified damages.

"It is unconscionable to allow Apple to continue unlawfully and without proper consent tracking Plaintiffs and proposed Class members," the lawsuit stated. "If Apple wanted to track the whereabouts of each of its products' users, it should have obtained specific, particularized informed consent such that Apple consumers across America would not have been shocked and alarmed to learn of Apple's practices in recent days."

Apple also faces in the U.S., and possible regulatory investigations in several other countries.

Last week, Sen. Al Franken (D-Minn.) and Rep. Edward Markey (D-Mass.) sent letters to Apple asking the company to answer questions about the location tracking.

Today, Markey called on Congress to .