While the filters are good and the app is relatively easy to use, it is quite disappointing that the images it produces have substantially fewer pixels than the input images. On my iPhone 4, if I start out with a 5 megapixel image from the Camera app, I end up with at most only 2 megapixels, and sometimes only a half a megapixel! If I start out with an 11 megapixel image from ClearCam (great app, BTW), I end up with only a few megapixels. Other "photo filter" apps preserve all the pixels, producing images with as much resolution as they started with, so I cant understand why Photo fx scales the images down so much.