Sleep Score Algorithm

[Buccola94588]

Hi Fitbit Makers and Users,

I am wondering if anyone else believes they receive a much higher sleep score than their sleep would suggest? I sleep usually between 5.5 and 4.5h per night which is awful and I should be getting 7-9 for someone my age (25). So how can I receive a sleep score of 73-75? Moreover, often the Fitbit records restless sleep, but I still get a disproportionately high score although I feel tired and crash sometime in the afternoon the next day. Finally, even during my sleep, I spend 15-25% awake each night. None of this should add up to above a 70 sleep score. 

If if anyone else sees these issues, I suggest for Fitbit consider how their current algorithm factors in duration of sleep and how it’s weighted toward long and short sleep durations and the quality of that sleep. It doesn’t seem correct based on my personal experience. But I could be an outlier.

Thoughts?

[MakMak]

Haha that's funny, @Buccola94588. I slept for 7 hrs and 16 min by their calculation and got a sleep score of 77. I also felt like I slept better last night than in some recent nights when I've gotten scores in the 80s. I don't think that Fitbit has nailed their algorithm for the sleep score down yet and also wish it could do some learning from feedback. I would love for it to check how I feel about a night's sleep and adjust the score accordingly, maybe even learning from that.

[stephcats]

I agree that the algorithm needs work.  My sleep score is consistently low (either poor or fair), whether I feel rested and believe I have slept well or not.  My awake times, light, REM, and deep sleep are almost always within the benchmarks. However, this morning it gave me a sleep score of only 54, though, according to it, I slept 7 hr 21 m.  My REM was 4 points below the benchmark, and the others were all within range.  Yesterday I slept only 5 hr 53 m, but it gave me a score of 69, though my awake time was one point below the benchmark, REM was 2 points below, and light sleep was one point above.   A week ago I slept only 3 hr 56 m, and it gave me a score of 58, higher than what it gave me today when I slept 7 hr 21 m.  I decided a few days ago that, as it stands, the score is really just an anomalous bit of somewhat interesting but mostly useless (because it is so limited) information.  I think the explanations concerning sleep heart rate and restlessness, and whatever else might come with the premium subscription concerning the sleep score, should appear with the score.  After paying $100 for the device, I don't see paying all that extra money in order to have enough information for an automatic feature to be useful, especially when I am not interested in anything else that comes with the premium subscription.  It feels like bait to me: give just enough information to create interest, but not enough to be useful or satisfy curiosity, so people will pay to have the rest.  I don't think so.