On the third day of the second beta of Apple’s (NASDAQ:AAPL) iOS 7 being tested, developers are busy discovering hidden features inside the re-designed mobile operating system, and the latest gem to be uncovered is it allows users to control their iPhone or iPad with head movements.

The iOS 7 Beta 2 includes a toggle in the Accessibility section of the Settings app, which users can flip to activate a new head-tracking feature, allowing them to control an iOS device by simply moving their heads left and right, said a 9to5Mac report on Wednesday.

The report stated that “an anonymous tipster” revealed the new feature, which can be found inside the iOS 7 Beta 2 by going to Settings > General > Accessibility > Switches > Switch Source.

The new head-tracking feature includes a blue box that acts like a cursor and can move to different buttons, toggles, icons and other user interface elements on the device’s screen. Once the box lands on an object of the user's choice, a hands-free onscreen tap can be initiated with a quick nod of the head.

“You can also make the left or right head movement act as a home button, start Siri, open Notification Center, open the App Switcher, decrease volume, increase volume, or simply tap,” 9to5Mac report added.

Although the new functionality appeared to be quite accurate, some found controlling the device in such a way difficult.

“Though it seems to be fairly accurate, it’s extremely tough to get the hang of. In fact, my iPhone 4S is kind of stuck right now because my screen won’t scroll down far enough for me to turn off the tracking,” Cody Lee of iDownloadBlog said.

Apple has been working on various accessibility options over the years, with a focus on vision, hearing, physical or motor skills and learning, in an effort to turn the iPad and the iPhone into fully-featured assistive devices. And the new iOS 7 is expected to introduce more improvements on this front.

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