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Fitbit recently changed Sleep Algorithm

After several weeks of nonsensical results, I got confirmation that they quietly changed the algorithm to add awake along with restless = “New Awake” results dramatically increase and my sleep scores are now in the 60s & 70s.  Jan - May was an average in the low 80s.  A few nights ago it had a solid block of 4 hours awake.  I think I’d know if I were awake that long.

If like me angry over the **ahem**ic change, send feedback and call tech support so they are bombarded with complaints.  Wonder if they consulted with sleep experts and scientists for validation but so far no comment from an escalation supervisor.

Engineering didn’t even communicate the change to tech support & the supervisory teams!  My supervisor agreed with me it makes no sense.  AI will validate being restless is different from awake so it’s now providing a fake awake calculation.

it should be rolled back to mid June before they sneakily made the change to destroy your sleep scores to consistently poor or fair.  

How do others feel?  Did you notice a major different/degradation?  Be vocal if you support me in demanding it return to the original algorithm.

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Hello @acalomin , @Ali123456 

I've experienced similar issues with my sleep log. I've gotten confirmation that the team is aware of the issue and is working on a fix. However, there isn't a timeline for the fix yet. I'll report back when I have an update. 

For now, please submit your issues using the Feedback option in the Fitbit app:

  • Tap your picture in the upper right of the Today page in the Fitbit app
  • Tap Feedback in the menu that opens
  • Complete the prompts and submit

The feedback reports are received by the team for review. 

Rieko | N California USA MBG PE

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I wish you luck in getting it addressed and fixed.  Honestly I gave up since an escalation supervisor told me candidly they didn't receive a "large" volume of complaints so it wasn't a high priority.  They also have not announced a Charge 7 (way past time) so I truly wonder if now under Google ownership Fitbit Charges are becoming obsolete and the push will be the Pixel watch.

I purchased last month a different type of tracker that is the #1 rated by the NY Times this past summer. I wore both my Charge 6 and the alternative for 2 weeks - continued non-sensical results with the Charge and the alternative was like the old Charge 6 - sleep scores consistently in the mid to upper 80s.  Higher HRV values as well.  Step counts are a little lower but I've since learned they use better methodology vs. what Google uses.  The company has also had an expert medical and clinical advsiory board since the company was started.

A lot less stressed now that I have an accurate fitness/health tracker that's credible and reliable.  Said differently, my "divorce" from Google Fitbit has been finalized.

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I have a Fitbit Charge 6, but recently changed from a Charge 5. I thought I was going crazy! My sleep score went from average 82 to 90, down to 60ish with a high of 75. They need to fix it! I'm a sound sleeper and they have my Awake or Restless at 3-4 hours a night. There's no way that's accurate!

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I did not notice a change this summer, but a few weeks ago I started seeing a huge change in that I could no longer change the start/end times and have it recalculate the graph and score. I almost always have to change the start or end time to make it accurate, which has always been an issue but has a workaround so I live with it. The help person I chatted with says that it doesn’t work that way. Well, it worked that way for years through three different watches/versions, so there’s yet another downgrade in functionality.  Starting to explore other options, though I’ve been a pretty happy user until the past year or so. 

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Hello @CJW88 

The Support person that you spoke to provided incorrect information. We are supposed to be able to edit our sleep logs and the app should recalculate the sleep stages graph and sleep score. That's the way it's supposed to work. 

There are a number of us who have been experiencing issues with editing our sleep logs, including me. The team is aware of the issue and has been working on fixing the problem. I noticed that there's posts about an app update that started rolling out this week. I don't know if it contains the fix for the sleep editing issue. If I find out that it does, I'll report back. 

Rieko | N California USA MBG PE

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Thanks!  The thought of switching watches isn’t great, I hope they resolve this issue before many of us are forced to change brands.

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I switched to the competitor that’s rated the #1 sleep tracker.  Have had it for weeks now and couldn’t be happier.  Quality results, clean app interface and very helpful AI-driven Advisor interactions.  I realize for those that have Google watches vs the Charge 6 there are different needs. I have luxury timepieces so a Google watch is of no use to me.

In not having to deal with so many issues related to Fitbit algorithms and glitches, my new stress score couldn’t be lower.  HRV averages are now in the mid to upper 20s.  The days of “9s” are gone.  Wish you all luck that they finally fix the mess they created.

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I thought there was something wrong with me. Lol My sleep has always been
consistent until about 2 months ago. Fitbit can say whatever, but they did
something and it's AWFUL and they need to change it back!
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I have experienced the same frustrations.  Why were these changes made.  Not an improvement but a big step backwards!!

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I have noticed over the last 3 days that mine are back to normal ranges
again. I hope they monitor these message boards and saw how unhappy we were!
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@simplepinoi177 wrote:

Sorry I'm coming from a Pixel Watch 2 rather than the Charge 6, but I've been getting fed up with my watch's (and now I'm learning it's Fitbit's fault) sleep analysis and it claiming I am awake on average now 45%-over 50%!!!! I began googl'ing my issue and there wasn't any real widespread reporting on it, and this was the first instance (now that I know it's not specific to the Pixel Watch 2's but Fitbit app as a whole, I'll broaden my search).

At first I thought it was my sensitivity (which I lowered from sensitive back to normal), then I changed the arm I wear my watch, to then making sure I wasn't wearing it too tight (put the peg one level/hole next to my usual to make it looser)! Absolutely nothing is making it less outrageous! I am not restless for half the night! I even employed some phone apps snoring & sleep analysis, just for a rough comparison, just to see if there was any even slight similarities, and the apps' analysis is completely different and doesn't match it at all.
It all clearly started when I updated my watch at the end of June (that was when my watch's latest semi-annual update) -- I had to go back every single day manually deleting sleep thinking to correct my average times and simply removing the buggy sleep (after hoping it had been corrected); and it goes back directly & only to that update.
What's weird is my wife's Pixel Watch 2 seems to be unaffected (or at the very least, that greatly). 

As I planned on resetting my watch completely, I think I will also do as OP suggests and call Fitbit customer support and complain.


So an update to this....I was able to fix things a bit where it's gotten back to being more or less back to normal; or at the very least not outrageous (giving me 39's and 40's).

So, the main thing I noticed was I was only getting decent scores (and it was even only in the 70's!) when sleeping like 8-and-a-half hours, and if I was to sleep for 7 hours and 45 minutes, it'll mark me at like 50's or 60's still! Then it made me realize that, even if I was being honest at trying/attempting to get the standard 8 hours of sleep, and inputting that in the settings, because of Fitbit's stupid messed algorithm and marking me as a whole lot more "Awake" than I know that I am, unless I'm getting more than those 8 hours and offsetting that messed up algorithm, I could sleep a really long time and still get a bad score; because it's counting more as "Awake" and so unless I put in more sleep time to add more non-Awake time, it didn't matter. Once I lowered the "sleep goal" -- and I mean rather unrealistic and severely (like 5 hours and 30 minutes) -- a good sleep that actually felt good was marked in the 80s; like it was in the past! No more of me getting where I could sleep for 7 hours and 30 minutes and feel really rested and get like 2%-4% more than my average deep sleep and REM, but only get like a 58 or 64. 
Another thing that helped a lot was lowering my Awake average (because at this point it's close to 40%) -- I couldn't do much about being Awake a lot in the middle of the sleep cycle, but I was noticing that the terrible stupid algorithm was having me "Awake" for like 30 minutes before "Light Sleep" and fifteen-to-thirty minutes of "Awake" before ending my sleep cycle; so I would edit my sleep where I noted the times right before I actually went into Light/Deep/REM Sleep and to the minute of me waking up out of those, and edited the times to 1 minute before and 1 minute after. So, for example, I was Awake from 10:00PM-10:29PM, 10:30PM-11:45PM Light Sleep, etc....then Deep Sleep from 6:30AM-7:15AM, 7:16AM-7:30AM Awake -- I would edit the sleep to from 10:29PM to 7:16AM. Thus removing like 45 minutes of extraneous "Awake"; and thus lowering my average (if done for enough days). I mean, the "Awake" is important and vital in the middle of the sleep cycle, but unless it's "Light" going in and out of the sleep cycle, what's the point of notating you're "Awake" during the sleep cycle when, technically, you're not even sleeping! And honestly I'd be alright leaving this be, if Fitbit's stupid algorithm worked properly.
And of course any "Awake" that's above 40% throughout the night -- where there are like 2 hour blocks of Awake where I know I wasn't "Awake" or restless -- and since I can't just edit it out at the ends, I just delete the whole night's sleep cycle. And for the last like 8 months, I have whole gaps of "no data" -- but better that than weeks and weeks of 50's and 60's average that I stopped even monitoring and checking my sleep scores for months there. Thanks for nothing Fitbit. Fix your algorithm!
I even waited for October's update (for the Pixel Watches) hoping Fitbit would fix what they broke back in April, and they didn't...

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About 30% of the time, my Fitbit Charge 6 abbreviates the sleep time and data. E.g., three times in the past week i fell solidly asleep around 10:00 pm, according to my wife who stays up reading.  But the chart on my watch doesn't begin recording until 11:15 or later.  (The begin time varies.)  The result is that i have  1+ hours unaccounted for in my chart.  When i use the Edit function to set the actual time i went to sleep, it adjusts the full duration of sleep (e.g., from 7 hours to closer to a full 8 hours), but the chart display does not change to reflect the updated total.  The total sleep time increases but only the initial incorrect delineation of Deep, REM, Light, etc. is shown.  The sleep sub-types do not update to reflect the new total sleep time.  I record my data breakdown daily in a spreadsheet and calculate mean, SD, and variance, and chart them.  So my Fitbit samples are becoming extremely unreliable. I've performed all recommended troubleshooting steps and those changed nothing.  My Fitbit sleep score is becoming a roulette wheel. 

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Hello @BunkyFit 

There's currently an issue on the Fitbit side where editing the sleep log doesn't update the sleep stages graph and sleep score. The team is aware of the issue and has been working on fixing the problem. 

I understand that a new update to the Fitbit app, ver 4.57, should be rolling out soon and is supposed to have the fix. Please keep watch on your app store and download the app update when it's available to you. Then let us know if the sleep editing issue was fixed for you. 

Rieko | N California USA MBG PE

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Will this be retrospective or will months of days be lost ?

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