Sleep tracking accuracy ios16

If you look at the various data points/sources I and others have provided here your experience may be the outlier. I have never seen a report from any sources (AutoSleep from the Apple Watch or the native FitBit sleep app) anywhere near five hours of Deep Sleep (or REM for that matter). My investigations across three apps and two separate hardware platforms do not support your assertions.

For you to make such an absolute blanket statement (AutoSleep is wrong) is highly presumptive.

"how poorly I sleep"

This can be an indication of other hidden health issues. I had poor Detailed Sleep reporting from my FitBit for several years; very frustrating. Subsequently learned I have some significant cardiac issues; sleep stage detection is based (among other things) on monitoring HRV which my conditions impacted. Once those issues were resolved though medication the FitBit began to return regular Detailed Sleep reports.

I'm not a doctor -- all I'm saying is your problems sleeping (and the seemingly exaggerated Deep Sleep reports you get) could be an indication of other health matters.

For what it's worth.

I had the SAME issue. my xiaomi Band 7 (the latest) has been recorded consistently 1 hour to latest 1 hour 40 minutes (and I can feel I slept well in the morning), BUT Apple Watch record I only have 7 min of deep sleep. that just doesn't make any sense.

iOS 16 Apple Watch series 8 does not accurately measure deep sleep when compared with Garmin and Polar devices. Data is clearly incorrect and the issue needs to be fixed. This is a healthcare aspect of the watch and should not be providing misleading information.

I’m having the same issue. Just bought the S8, and found it strange that my deep sleep was never higher than 30 minutes.

I downloaded Pillow and when I got the results for the first night, there was a big difference.

something in there algorithm is off.

edgargtryr54 wrote:

According to my doctor and his ecg, my heart is in great shape and so am I. But thank you for your concern.

Good to hear -- my point was your situation is not an absolute global one. People should know, not guess. . .

Same issue.

Comparing results with a FitBit Charge 2 IOS 16/Watch OS9 Apple Watch 4 Last night recorded 12 minutes of Deep Sleep, 1 hour 30 minutes of REM; FitBit recorded 1 hour 33 minutes of Deep Sleep, 52 minutes of REM.

There may be differences in the algorithms used. That said the differences shouldn't be that pronounced.

bucc208 wrote:

iOS 16 Apple Watch series 8 does not accurately measure deep sleep when compared with Garmin and Polar devices. Data is clearly incorrect and the issue needs to be fixed. This is a healthcare aspect of the watch and should not be providing misleading information.

You can let Apple know your thoughts here:

Product Feedback - Apple

I always wear Fitbit and Apple Watch to bed. I have the Pillow app which uses the Apple Watch 16 facts. Apple 16 as well as Pillow in the past have my deep sleep almost 2 hours higher each night. Fitbit has to be right. I am an extremely light sleeper. Above is Fitbit’s last night results.Above are Apple’s and Pillow’s night night’s results. I have been in contact with Pillow about the differences. I have used Pillow for 4 years. Most of the comments on this forum state Apple shows less deep sleep. For me, it shows much greater deep sleep. Also, Apple and Pillow stop recording when I get up in the middle of the night to use the restroom. I am able to adjust the wake up times in Pillow. Fitbit shows I had 50 minutes of deep sleep last night. Apple and Pillow show I had 2 hours and 34 minutes of deep sleep last night.

Hello,

I was searching for this exact situation, glad I stumble on this thread. I have the same conclusion.

For example last night, in Apple sleep tracker it indicates 46 min of deep sleep.

I also use the Autosleep app and the deep sleep indicates 2h 34min.

I had a Garmin watch for a year, and the sleep analysis was more inline with the Autosleep app.

Like it was mentioned, I guess the Apple algorithm for sleep analysis is different?

Thanks, I thought it was just me not getting enough deep sleep, now I know its probably Apple

Some more data for you:

Apple Watch

9/21 12 Min Deep, 54 min REM

9/22 26 Min Deep, 1 hour 26 min REM

9/23 34 Min Deep, 34 min REM

9/24 15 Min Deep, 1 Hour 12 Min REM

9/25 31 Min Deep, 1 hour 143 Min REM

9/26 31 Min Deep, 58 Min REM

Applied IOS 16.02 Update on 9/24

FitBit Charge 2

9/21 7 Min Deep, 18 Min REM

9/22 1 Hour 6 Min Deep, 41 Min REM

9/23 36 Min Deep, 4 min REM (Only 5 Hours sleep that night)

9/24 No Sleep Stages reported

9/25 1 Hour 1 Min Deep, 22 Mon REM

9/26 12 Min Deep, 53 Min REM

FWIW

ETA: On further consideration I wonder if the Auto Sleep algorithm is different from both the FitBit/IOS algorithm. And which one(s) is (are) more accurate. Looking at my AutoSleep data for the periods involved the Deep Sleep totals are much higher than either the FitBit or IOS.

Fascinating

I have decided not to use mybapoke watch ultra to keep track of my deep sleep and continue to use fitbit and other sleep tracking devices to track, because indeed for bizarre reasons my apple watch shows extremely little deep sleep consistently (in terms of number of minutes only) vs my other sleep tracking devices which shows consistently over 60minutes or more.