For the past few weeks, I've been alternating between a Fitbit Charge 3[1] and a Fitbit Versa[2] in order to participate in the company's Sleep Score Beta.
The beta opened up for registration in December, but filled up quickly and is currently closed to new sign-ups. The Fitbit Ionic[3] is also compatible with the beta and is available to residents in the US, Australia, and UK.
Also: The 3 best ways to track your sleep CNET [4]
Each morning, after syncing my Fitbit with the Fitbit app on my phone, I would visit the Sleep Score beta website[5] where a series of questions awaited. I was asked to rate my mood in the morning, how much energy I had when I woke up, and indicate if I had any alcohol, caffeine or worked out before falling asleep. There was an expanded set of questions that included more details about exercise habits for the previous day.
After answering the questions you are then shown the various metrics measured by the Sleep Score beta.
What's measured?
The quality of a night's sleep is scored on a scale of 0-100, with a score of 90 considered "excellent," and anything under 60 considered "poor." This is the most prominent section of the Sleep Score beta page and uses multiple points of data to provide a score.
There are three subcategories that are also scored: Sleep Duration, Sleep Depth, and Revitalization.
The first two are similar to what users currently see in the Fitbit app, comparing your goal of sleep duration to what you actually slept, as well