I downloaded the swingreader app for my Iphone 3gs about a week ago and used it at the range a couple times this week. I just proped it up on the bag holder and secured it with a rubberband. I really like the app. The ability to record my swing and then slow it down for analysis is great. The app also lets you draw lines for your swing plane or to see if how much you're swaying during your backswing. It really helped me pickout where the flaws in my swing were. I thought my swing was good, after comparing the slowed down version to other swings, I really noticed some things that I need to fix. Now the hard part, actually fixing them. The free version was all I needed. I didn't download the full version. Give it a shot if you're looking for a free app to record your swing with.