Originally posted by visor
The reason I didn't try that before was that I thought REM cycles had some variability from person to person.
It does vary a bit. Which is why I don't like the time system.
Besides if you can detect when you're going into REM, you can find out more about your sleep health.

And the vibration was generally the idea for the glove.
I didn't like the idea of electrical shock or pain.