It works for the Icon. The only problem I found was that depending on your lock screen it won't work. I use Lockmix and when I tried to take a photo, it locked my phone. After changing my lock screen to "photo," I had no problems with it working.
It is slow too. When I say, "camera take a photo," it takes a few seconds to trigger then it automatically gives you a 4 second countdown. So to take a photo, it takes anywhere from 4 to 7 seconds before it actually shoots. Not very practical, but still kinda cool.
Addendum: When you say, "camera take 3 photos in 10 seconds." It means it will take three photos after a 10 second countdown, not 3 photos within a 10 second time span.
Addendum to the addendum: It doesn't use the front facing camera, just the rear. So, if you want to take a selfie, you have to use the rear facing camera, which can make composing the shot problematic. Also, it doesn't save to the camera roll. It saves to the root pictures folder and names it photo.jpg. So if you take several pics using it, you'll have files named photo.jpg, photo(1).jpg, etc. in your pictures folder.
This is a nice app, but I'm not sold on its practicality. It takes two hands to use, it is slow, doesn't access the front facing camera, doesn't use the WP photo naming convention (i.e. WPyyyymmdd_hh_mm), and doesn't save in the Camera Roll folder.