I was searching for info on handheld timers and saw reference to apps in a forum. I saw one 2D barcode and it went to a broken link. I don't know how to download apps from a computer to my phone, so I didn't search further that way. Going to the droid market and searching for "shot timer", I found four of them, with "ShotTimer PRO" getting the best reviews. There is a free version and a $10 version with more features. I'm sure there are plenty for iPhone/Touches too.