Apple Sleep App 6 Month Tracking Inaccurate

Sleep tracking with Apple Sleep app is accurate for day, week and month (IOS 9.4 watch; IOS 16.4.1 phone) but 6 month data is completely inaccurate and does not match other data sets. This has been an ongoing problem since I started sleep tracking and I have followed every recommendation. I suppose this is more of a complaint than an ask but it is extremely frustrating to invest so much money in Apple products to have an Apple system app that is touted but inaccurate. I really wish I went to bed two hours earlier than I did and slept 1-2 hours longer over a 6 month period, but alas, no.

Apple's basic remedy is for me to waste my time on the phone going through steps that I have already taken. And, I refuse to add another sleep app to my phone and watch and use up more battery life. Since this information is reported to some health studies it should be reviewed by Apple and corrected. And, it is difficult to find a topic that matches since System Apps in general is not listed in the drop down list. Shame on Apple.

Anyone else frustrated?

iPhone 12 mini

Posted on May 5, 2023 2:41 AM

Top-ranking reply

B3NI123

Level 1

32 points

Posted on Jul 22, 2023 8:18 AM

Solution: the standard view of the data is the “stages” view. Using the Amounts view solves the issue.6 months —> Show more sleep Data —> Amounts

Cause: I don’t know why AVG TIME ASLEEP is shown wrong when looking at stages. It seems they calculate the average “sleep start” and “sleep end”. But that also doesn’t make sense, and also I can’t find the way they would calculate this. Maybe they use a kind of elastic day, where a day ends when you go to sleep, not at midnight.Here is what I have tried:

Night 1 2020-04-16 10:00 PM 2020-04-17 4:00 AM

Night 2 2020-04-18 1:00 AM 2020-04-18 4:00 AM

On a weekly and monthly basis, my health app calculates an average of 4h30min sleep time, but on a 6-month basis, it calculates an average of 6 hours. Also, 6 months (when not looking at amounts) shows: Sleep starts 11:30 PM and sleep end 5:30 AMAssuming these averages are simple arithmetic means, the average start time is (10:00 PM + 1:00 AM)/2, and the average end time is (4:00 AM + 4:00 AM)/2. However, the issue with this is that time doesn't function like regular numbers due to the cyclical nature of the 24-hour clock. If you consider 1:00 AM as 25:00 (in a 24-hour format, considering it as an extension of the previous day), then the average start time would be:(22:00 + 25:00)/2 = 23:30 (or 11:30 PM)That aligns with Sleep Start in the Health app. But not with sleep end.

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Apple Sleep App 6 Month Tracking Inaccurate

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