This file describe the software requirement in order to get the project compile and run. First, xcode 4 is required. Second, a copy of the OpenCV library files compiled for Mac should be present. If you need a guide on how to get a copy real quick, visit this page: http://computer-vision-talks.com/2011/02/building-opencv-for-iphone-in-one-click/. This project is developed with OpenCV 2.3. Third, change the Search Paths in project setting to point to the correct location where your OpenCV library files are. Off you go. App Store product page: http://itunes.apple.com/us/app/sudoku-resolv/id446583583?ls=1&mt=8