Your sleep tracking just got more accurate

[StefanieFitbit]

If you’ve noticed that your sleep stages, sleep time and awake time have changed recently, you’re seeing our latest improvement in action. This is the first step in a series of upcoming improvements to improving our sleep tracking — so stay tuned to hear about these changes as soon as they happen. 

We understand that changes in your data can be surprising and appreciate your feedback. 

What changed?

We've updated our tracking technology. This is to provide a more precise measurement of your sleep stages. Our goal is to always give you the clearest and most accurate view of your health.

For example, you may see your awake time increase slightly as we now capture brief awakenings the old system missed. This is a normal part of sleep.

What this means for you

The sleep data you see now is a more accurate reflection of your night's rest. This more detailed data will help you better understand how your body is recovering each night.

We appreciate you being such an engaged member of our community.

Please note that these changes only rolled out to users of the following devices:

Smartwatches: Versa Lite, Versa 1, Versa 2, Versa 3, Versa 4, Sense 1, Sense 2, Pixel Watch 1, Pixel Watch 2, Pixel Watch 3, and Pixel Watch 4

Trackers: Alta HR, Inspire HR, Inspire 2, Inspire 3, Luxe, Charge 2, Charge 3, Charge 4, Charge 5, and Charge 6

[Mypixelwatch]

Oh, well, still broken after the 4.56 update. You can see on watch it stretches the data to fit into the new time window (starting at 12:55AM), but on the phone it just leaves the window of my best sleep of the night empty and only shows starting at 3:09AM when I went to BR. Since it shows me starting sleep in the middle of a REM session, there's clearly a bug somewhere as Fitbit always buffers either end with awake time. 

What a nightmare (pun intended.) 

Stretches to fit!Doesn't update lost time.

[Copland]

Yes they either cannot find a fix or they don't believe there is anything wrong with the sleep accuracy.  The community leaders won't say anything suggesting that there is a problem but choose silence based on legal advice.  For the first 5 years I used fitbit, I averaged 8 hours sleep a night.  After the changes glorified in the original email of this thread I have been averaging around 5-6 sleep a night.  Given that I have not noticed any change in my sleep patterns, which figure do you think is right?  Or is fitbit now of the view that 5-6 hours of sleep a night is all you really need?

[Mypixelwatch]

No change a day after getting the 4.57 update. Nothing changed even though it was said that the update addresses this issue in another thread here. 

Before edit:

I checked heart log and my heart rate cratered at 12:55, so I added 10 min as a buffer and put start at 12:45.

I also removed 1/2 hour of awake time at the end, which does remove it from the awake time on the graph. The tell that it's broken still is when I clicked on edit AFTER adding the missing time in:

So sad, it doesn't even match what's displayed on the sleep summary screen, meaning editing still doesn't work in 4.57. 😕

[Copland]

You have to wonder why nobody from Fitbit will comment on the changes, maybe they just hope the problem will go away certainly StefanieFitbit and Fitbit seem to be putting their resources and expertise into the ASK COACH feature now - can't wait for that!

[whollis]

You’ll notice very careful wording on the Charge 6 - “as long as supplies last”.  Also no announcement for a Charge 7.  I suspect the shift under Google ownership is the Pixel watch, not legacy Fitbit devices.  The “dive in” Advisor with the Oura ring is impressive.  Even gave me accurate feedback on changing medication to a beta blocker which lowers heart rate and the impact I’d likely see regarding cardiovascular age.

[Mypixelwatch]

I was just thinking this morning how well the sleep tracking has been working - when it works - which is maybe 85% of the time (6 of 7 days.) 

Unfortunately when I got up just after that, I saw 4hr 20 min of sleep in one session, 59 min in another for a total of 5hr 19 min sleep.  So, I deleted the 59 min sleep session and changed the start time of the main session to 12:43 AM (versus 2:52 AM.) I saved and, or course, nothing recalculated. 

Score of 75 remains, even though each individual sleep session had a sleeping efficiency of 79% and 89% and my total sleep would be sufficient (my body says it was) if it hadn't lost the hour between 1:49 AM to 2:52 AM. I was not awake during the gap time and each individual sleep session showed me asleep when it cut off before/after the gap. I hope this info gets to the right people as I am only reporting this here. 

[Copland]

Why on earth must you manually edit your sleep data.....when apparently "Your sleep tracking just got more accurate" in June 2025.   Never once had to do that in the preceding years.  Certainly StefanieFitbit forgot to mention that requirement.

[Mypixelwatch]

The things is, the sleep data is plenty accurate. Before the update, I used to comment "surely I was awake more than that" on nights when I was very restless. I'm all in for making the code more precise in detecting awake time. Unfortunately the updated code broke something related to the detection/recording of sleep data and Fitbit engineering is having trouble fixing the issue.