I was watching the outdoor channel one night and saw them use this app, after they shot a deer. It is called Shot Simulator by F+W Media, Inc. it costs 4.99. I don't really like to purchase apps( I like the free ones). It has mixed reviews but it will help you figure out depending on where your shot was you can see what organs you may have hit and help you decide how long you may want to wait to go look for that deer. I think the reviews are from people who thought it was a game, and they don't understand what is for. Well I thought someone may like it, so let me know if anyone decides to download it. Thanks Snack