janetisserlis replied to your photo: Actually most nights I get 4 hours if I’m lucky….
how does the sleep tracky thing know?
The Jawbone UP is worn on your wrist:
Quoting the FAQ:
How does UP track my movement and sleep?
UP uses a precision motion sensor and powerful algorithms to passively track and quantify your steps, distance, calories, active time, and idle time. It calculates calories burned based on your age, gender, height and weight, along with activity intensity and duration. UP uses Actigraphy to track your sleep, monitoring your micro movements to determine whether you are awake, in light sleep, or in deep sleep.
So that’s how it is tracking sleep.
There’s a $1 iPhone app Sleep Cycle alarm clock which will also track your sleep patterns, but you have to plug your iPhone and put it between the mattress and the sheet.
The app is great, but I never remembered to do it.
(Note: Fitbit will also track your sleep. Use the included wrist-band.)
I don’t know that any of these systems are 100% accurate in tracking sleep, but I figure they will let you compare one night to the next and give you some sort of an idea over time.