There is an app on the AppStore that claims to do something similar using only built-in phone hardware (accelerometer). Anybody got any experience with it? Seems like some reviewers claims that the readings are bogus. Is the accelerometer on the iPhone sensitive enough to register movements as claimed by the app? http://itunes.apple.com/us/app/sleep-cycle-alarm-clock/id320...
I use Sleep Cycle when I absolutely need to be up at a certain time. I also like the no-alarm mode just for tracking sleep. When you first run it, they have a calibration mode where it makes a noise when it detects motion, so you can roll around in bed and listen for where you need to place it.
It probably depends on your mattress how well it works. If you've got a foam mattress or one of those ones with commercials of dropping bowling balls next wine glass towers, then yeah, maybe your phone won't pick it up. But it seems to work well enough with my cheap mattress.
In the morning, I can definitely see spikes on the graph for times I know I woke up to pee, so it's definitely detecting something. I don't know about those reviews that say they still get graphs with it left on the dresser; I've not tried that test.
I tried that out too, but it didn't seem to make it any easier for me to wake up (still felt sleepy/groggy). I decided to buy the Zeo since they had it at my local best-buy and I could easily return it. I honestly didn't expect it to work any better.
