Learning from the mistakes of such apps as Camera+ and Quick Snap, another developer has circumvented Apple’s button controls for use as a camera shutter. Apple restricts the mapping of button functions, but allows developers to remap the functions with accessories to accomplish such tasks. Camera Mic repurposes the device microphone input as a shutter release. Designed for the stock Apple earbuds with mic, or even the built-in mic, the app accepts sound input or even mute button input to activate the shutter within the app, similar to extended shutter cords on standard cameras. This can be particularly useful when the phone is placed in a location or on a tripod for self-portraits or unusual angles, where access to the virtual camera button is difficult or impossible. The sound sensitivity may be adjusted within the app. I tested it with the Zagg Smartbuds and the mute button also works.
Other features include the ability to toggle the flash on and off (in the app, not with a mic), sharing photos on Facebook, Twitter and through email, and viewing recent pictures as well as your photo library within the app.
The app is 99 cents, and works with iOS 3.1 or later running on an iPhone or iPod Touch (4th gen). The devs suggest support for bluetooth headsets, which would allow wireless shutter control, and front/rear camera switching will be coming in the next update.
For more information on apps for jailbroken devices and a similar iPhone case with built in tripod mounts and using the volume buttons for shutter control, read the article here. Check after the break for screenshots of Camera Mic.