Best Sleep Tracker Device?
I've been experimenting with using the Sleep Cycle and SleepBot iPhone apps -- these are pretty cool. I'm curious how these would compare to something like Beddit Smart, ResMed S+, Withing Aura, etc. I heard someone mention that the Beddit might emit some EMF (like sleeping on a power cord), while it sounds like the ResMed aims radio waves at your body while sleeping. I'm not sure if these are legitimate concerns.
I was also reading about the "LucidCatcher" and "Aurora" lucid dreaming devices, which seem pretty cool.
What's the best sleep tracker? Ideally, I'd like something that can measure pulse / breathing / REM sleep. I'm not sure if wearing some sort of wrist band would be annoying.