This was the same original image as in my two previous posts, this time modified using TiltShift. The app lets you add a blurred area, and dark edges.
This app was great when I first got it, and there is even more flexibility now in the shape and size and angles used to define the blurred region. It also does a very good job adjusting contrast, saturation, and brightness. Given all that it can do, it's pretty simple to use because of the way the edit screen is laid out. This is one of my favorite apps. (I have about 20 that edit photos in one form or another and this is in the top 5).