It's called Color Harmony.
What you do is take a picture, tap on a color, and it'll show you which colors look good with it.
I used it to paint our bathroom - my wife got new curtains, we snapped a picture, and a few taps later we found out that light green would go great with those new curtains. We went to the paint store, got a gallon, and a few days later it looks fabulous!
Next I hope to use it for clothes shopping, I'll be 'da man' looking great and color-coordinated!
If you have any comments or want to see any features added, just post a comment. Thanks!