This app has simplified the design process for me in the field and in the studio. Some of its suggested massing options are so much better than anything I could have imagined on my own. Works perfectly. Not a single crash. As for the guy who had problems with sizing and cropping, I thought the same thing at first, but it is cropping both directions. The app is smart enough to maximize the screen size so you may need to rotate your art. All of this is on the help page.
Italian angel about ValueViewer