ThinkO - Are you as smart as you think? Take the challenge with ThinkO - Puzzle Game for iPhone / iPad ThinkO will be FREE on October 29 for a limited time. Let us know what you think. Links: AppStore: http://itunes.apple.com/us/app/thinko/id503606771 HD trailer: http://youtu.be/JUPj5DgPIIk?hd=1