The guy that is selling this and I have been having a discussion on Facebook. About rather this would be cheating or not to use in a tournament match. He thinks it's just a teaching tool that could be used as a coach during play. I think if you used this to help you make a hit on a ball that you would normally miss it amounts to cheating. What do you guys think. This is what I'm talking about. https://itunes.apple.com/us/app/bank-shot-calculator/id408036469?mt=8