It should be comfortable enough and not disturb your sleep.Accuracy is the most important feature because what’s the point of investing in a sleep tracker if you can’t trust its data? You will find several reviews of sleep trackers on the web (e.g., see here, here, and here) but interestingly none of them mentions their accuracy. In my opinion, three main criteria matter when choosing a sleep tracker: Stages 1 and 2 are identified as light sleep Stages 3 and 4 as deep sleep and Stage 5 as REM sleep. Rapid eye-movement (REM) sleep (Stage 5).Two stages of deep sleep (Stages 3 and 4).They occur right after you fall asleep and start each new sleep cycle (Stages 1 and 2). Sleep trackers provide two main kinds of information: Total sleep duration and sleep quality, measured by the time spent in the different sleep stages.
What kind of information can you get from a sleep tracker? I describe their features and report the scientific evidence in favor of their accuracy so that you can make an informed decision. In this post, I review the six most popular sleep trackers on the market.
The problem is that there are dozens of sleep trackers available today, varying in price, format, and quality. They are growing in popularity because monitoring the quantity and quality of your sleep helps improve physical and mental health (to understand better what sleep trackers can do for you, see this post). Sleep trackers are devices that measure your sleep.
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