Triggertrap Iphone camera trigger

So, what does Triggertrap Mobile do?

At launch, Triggertrap Mobile has 12 different triggering modes, but we've got ideas for many more...

Sound Sensor - in this picture, you can see it triggering the focus and shutter on my camera. The sensitivity is fully adjustable (with the slider).

The Triggertrap Mobile uses a large number of the sensors built into Apple’s iOS devices, giving you an unprecedented number of options for triggering your camera.
You can use the Triggertrap Mobile Dongle to connect most SLR and some compact cameras to your iPhone, or (for some of the triggering modes) you can use the built-in camera.
At launch, the Triggertrap Mobile has a dozen (Count ‘em! 12!) different triggering modes, and we have tons of ideas for additional modes, too. For full details, see the Triggertrap Mobile product page, but for now, some of the ones we are most excited about are:

• Distance-lapse (Like time-lapse, but takes a photo for every X meters traveled)
• Eased Timelapse (Like time-lapse, but with 5 different acceleration profiles built-in, making it appear as if time ‘slows down’ and ‘speeds up’ at the beginnings and ends of your timelapse sets)
• Facial Recognition (“Trigger when 3 faces are visible in the picture”)
• Magnetic sensor (Like the alarm sensors on doors and windows)
• HDR mode (up to 19-bracket HDR sets with configurable EV steps)
• Sun rise calculator (calculates the precise time until sunset and sunrise based on your current location)

Of course, we also have loads of the ‘obvious’ features too, like regular timelapse, sound sensors, HDR modes, HDR timelapse, motion sensors, and loads more.
Info from Triggertrap.com