Inaccurate sleep on Charge 6

[Copland]

Did something change with the sleep tracking on the Charge 6 on or about 23 June 2025.  While I used to have sleep scores consistently above 80 with 8 hours sleep, since that date my scores are between 66 and 74 and it shows sleep times between 6 or 7 hours every day (I would occasionally get these sort of sleep scores previously but only if i had a bad nights sleep).  Personally, I have not noticed any change in my actual sleep patterns.  I have reinstalled my app and restarted my Fitbit and Bluetooth.  I have not changed the way I sleep or how I wear the Fitbit. Is there a setting I need to change?  Or was there an update that changed the way sleep scores are calculated. Thx

Moderator edit: edited title to clarity.

[Matt3055]

Google changed the algorithm back in June and apparently refuses to admit
they actually made a mistake.

[Ddallas7596]

I’ve been having this issue for the last 3 months. Is says I fall asleep at midnight and wake up at 3am, or it will stop tracking if I get up to go to the bathroom in the middle of the night. 

[SelJ]

Settings are at “normal” and editing the sleep data does not help. Sleep data consistently inaccurate. Please make a change to the algorithm in order to fix this problem that is clearly affecting many users across the board. 

[BEA2026]

Count me in.  My sleep tracker has not worked properly since the change in June of 2025.  Last night I slept for nearly 7 hours.  I got up once for about 3 minutes.  The result today showed I was awake for over 2 hours and I had a score of 46.  That's just plain junk!  I originally bought my Fitbit for steps, and it still works fine in that regard, but as a 10 year customer and premium subscriber, I am terribly disappointed with other aspects of my Fitbit Charge 6, especially the sleep tracker.  P.S. I have tried all the suggested fixes multiple times.

[JazzBuffalo]

I’m with you. The first 6 months of 2025 I had excellent scores and each month over 7+ hours per night and 6 straight months of 7+ average. The 2nd half of 2025 I never hit 1 month of 7 hours and missed the year total for the first time in 6 years. It’s not a fluke. The algorithms were changed and the numbers were reflected in the results. I’m using an Oura ring now and in search of my next device. Please let me know if you find a great replacement. I’m ready.

[Copland]

Because the Community Leaders remain on mute, many users have given up waiting for the sleep algorithm issues to be addressed (it's been 7 months) and have sought out new devices that they can rely on.  Has key IT expertise been shifted to prioritized AI projects?

[whollis]

I gave up on any chance of a fix.  Like you, I have the Oura 4 and couldn't be happier with the quality sleep results I get each and every day.  I wore it along with my old Charge 6 for 2 weeks to make certain I'd like the replacement.  The differences in poor quality data with the "improved" algorithm vs. the ring was night and day.  The only major difference is with Steps - seems the Charge 6 was much more "generous" with 3 of steps taken vs the more conservative readings I get know.  Overall - zero regrets and like others glad I made the swap out.

Notice too there has been zero info on a Charge 7 replacements, just rumors and speculation and we are almost 1 month into 2026.

[BEA2026]

Good to know. Thanks. I like the idea of wearing both to compare.

[bookbrowser56]

If they are monitoring this issue, I'd be absolutely shocked. This has been going on for months and they just ignore us. I don't even bother to look at my sleep scores anymore. They are meaningless.

[Copland]

Yes i don't bother with the sleep scores anymore either and if you cannot rely on that then how can you rely on any other data the Fitbit is generating.  I now only use the watch function (this works) and to get notifications (this mostly works).

[BEA2026]

Agree.  I just felt I needed to voice my frustration.  Thanks.

[Copland]

Fitbit seems to be super focused on the "Ask Coach" feature so issues like sleep scores are less important.  But I am not sure how @StefanieFitbit  "Ask Coach" feature is going to work if your Fitbit sleep data says you only slept for 2 hours last night.  It is simply going to a textbook case of "Garbage in Garbage out".