In what was likely an error in Apple's approval process, the $1.99 application (iTunes link) "Quick Snap - Camera Plus" is available for purchase on the App Store. In the description by developer GoodCode, it advertises first and foremost the software's ability to make the iPhone volume button a camera shutter button.

"Why choose the soft or full screen shutter when you can use VOLUME BUTTON as the hard shutter button on your iPhone?" it reads. "You are now one step close to the real digital camera experience! Isn't that awesome?"

Released on Dec. 15, "Quick Snap" is still available for download on the App Store. The 2MB application requires iOS 3.0 or later, and is compatible with the iPhone and fourth-generation iPod touch.

Using a hardware button on the iPhone for anything other than its designed purpose is against the terms of Apple's developer agreement. This fact gained considerable attention when another application, "Camera +," was pulled from the App Store in August after it was revealed the software included an "Easter egg" that allowed the volume button to serve as a camera shutter.

"Camera +" was eventually allowed into the App Store last week with a new version 2.0 update packing more than 50 new features. Not among those features, however, was the previous, secret camera shutter button, dubbed "VolumeSnap." – via AppleInsider



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