Interesting app for the iphone that may help

Hi guys, I recently bumped into an app called Sleep Cycle Alarm Clock. Basically what it is intended to do is monitor you while your sleeping using the iphones accelerometer and wake you up in the lightest sleep possible to help you wake up refreshed, but the thing I figured would help some of you guys out is each night it keeps a chart of your sleeping pattern showing when your in light sleep and in deep sleep. I figured with this chart it would help some people to figure out when they are in REM so you would be able to set a alarm to help wake during dreaming and help beginners, like me, with there recall.

Heres a link to app on apples website if anyone is interested. I just downloaded it today and will let you guys know how it works and if I get any good results and by the way its only $0.99.
Sleep Cycle alarm clock for iPhone, iPod touch, and iPad on the iTunes App Store

I've tried it and much like the reviews say, it's pretty crap. You can try it if you want but I had poor results using that app.