How the Apple Watch Tracks Your Sleep (Scientific Review)

[@TheQuantifiedScientist]

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[@kroz7682]

Great video. Would you say the series 4 Apple Watch is still accurate or is it time to get the 9 ?

[@RayanMufti]

What’s Super Sound?

[@danielmoksmann5654]

Waiting anxiously for your review of: - Galaxy Watch 7 - Galaxy Watch Ultra - Galaxy Ring (Maybe in the same video)

[@Excog_]

The Galaxy ring is the most important one, I think. It is its main selling point.

[@ama-tu-an-ki]

Yes, Watch Ultra has the new upgraded sensors. So far Samsung has performed relatively badly compared to the competition (Apple, Huawei). It'll be interesting to see if they've trained the new sensors on any better data this time around.

[@212roblox212]

Yess Samsung Galaxy Ring

[@tiago4599]

Yeeeeees

[@williams4057]

@@ama-tu-an-ki The regular watch 7 also has the new upgraded sensors too.

[@Etb323]

I’m crying in my Garmin watch. This data does reflect my experience. Sometimes my watch says I had restless sleep but I feel well rested. Gonna stop using the watch for sleeping.

[@donpeleas4780]

in other words, you don't need a watch to tell you whether you slept well or not.

[@TheQuantifiedScientist]

Thanks for sharing!

[@suzzzzzzzzzzzz]

Confirmation bias??

[@ZeDarkLord]

Thank you for making such in-depth videos that are simple to understand. And kudos for putting in all the efforts behind to make it as scientifically accurate as possible.

[@paulstejskal]

Agreed. This is very helpful.

[@5ervalkat192]

Very interesting stuff. I’ve used an Apple Watch for sleep tracking in the past and found it was terrible. It consistently said I got zero deep sleep, which is incorrect. I switched to a Garmin and though not perfect, the general picture looks a lot more normal. After seeing your video I’m remembering a conversation I had with Garmin about sleep where I mentioned that I move very little during sleep. He said that makes it difficult for trackers to score me and I’m thinking an Apple watch would struggle more due to its reliance on the accelerometer. Just a thought.

[@Zomboy4313]

I like how in watchOS 11 it can track sleeping with naps instead of only during sleep focus

[@Ask-Ali]

Would love to see you recover this in the new watchOS update coming this September! The watch can finally track automatically without you having to set up a sleep schedule.

[@Soundwave857]

wait for real? This has been my biggest issue with my apple watch and apple fanboys constantly told me they already do that

[@Ask-Ali]

@@Soundwave857 yup! It’s confirmed. Idk why they’d tell you that lol. That definitely wasn’t the case before

[@andretheseal9837]

Oh thank f**k lol. Im letting my whoop subscription lapse due to too few meaningful updates and the data showing AW being more accurate for some things and on par with others but having to set it to sleep or on a schedule that I might not stick to has been driving me crazy .

[@rutepereira7628]

Same here!

[@Zomboy4313]

@@Ask-AliI think it worked on watchOS 7-8 before they added the more complex sleep tracking

[@Metalmachine18]

I love the Apple Watch, and love that it’s a great Heart rate and sleep monitor. But it is BAFFLING how bad the Apple Health app is at presenting that data. You’re basically forced to get a third party app if you want to make that data useful.

[@sexypizza7729]

Any suggestions for such an app?

[@deandawiz]

hey, which third party app had worked for you? Im starting to take weight loss seriously and would like a more in-depth view of what my watch is capturing. Thank you in advance.

[@Metalmachine18]

@@deandawiz I’ve played around with lots of them; Gentler streak, athlytic, healthfit, AutoSleep, heartwatch and a few more smaller ones. But the one I settled with is Bevel. Abit more expensive and comprehensive and I like the long term plan for the app

[@lolitsgavin1315]

@@deandawiz Athlytic app is the best in my opinion, it’s almost like whoop in the sense of recovery status and likes all your information into one place. You can pair it with MyFitnessPal to get the amount of calories you’re eating a day into your tracker too

[@Allex46]

@@deandawiz autosleep

[@mixy2647]

It would be great a video reviewing the 3rd party iOS apps that present your Apple Watch sleep data and correlate it against manual entries: alcohol, coffee…

[@boyangirginov]

Incredibly in-depth and well presented review; thanks so much!

[@MrActiveservo]

So interested to see Galaxy Watch 7 with the upgraded sensors!

[@shinheejung6258]

I'm looking forward to watch your Galaxy Watch 7 reviews. According to Samsung Electronic, They use new bioactive sensor(They number it as bioactive sensor 3). The difference between bioactive sensor 2 & 3 is a number of LED light (I guess that LED light was increased from 4 to 8). anyway, I can't wait to watch your Galaxy watch 7 reviews and other scientific reviews.

[@stevecohen161]

Rob, I appreciate your work and diligence. Thank you ... Steve

[@UnosofManila]

What sleep issues affect the accuracy of sleep trackers? I'd like to know if I am a healthy sleeper

[@TheKix0u]

We'd love to see a comparison between the Oura ring and the Galaxy ring! A video comparing all of the smart rings would be awesome!

[@pubwvj]

I got the Apple Watch Ultra for its scuba dive computer function which is excellent. I have been exploring the sleep monitoring. It shows me as waking up a lot during the night, many short wake-up’s, and sometimes shows me taking much longer to get to sleep than I think is correct. 🤔

[@danilos7195]

Hello, could you do the test on the new Galaxy Watch 7, with the new sensors? Thanks

[@netmanswe]

The effort you put into analysing all these devices is astounding. Thank you for making it available to everyone.

[@lovethytuber4770]

I appreciate your work! Your videos actually answered a lot of questions I had! Too bad some companies have put their respective software behind hefty paywalls.

[@ListonCrest]

The main sleep metric I am intereted in is ”total sleep time”. It would really neat if you could change one of the axis to “total sleep accuracy” to see if any other trackers are better with that perspective.

[@Caelo_music]

Really impressed by the Apple watch and I didn't know that they were only using the AC data. Kind of surprised that the others are behind Apple in that regard, since they too should have tons of sleep data to train their models on. Guess Apple engineers are just doing an excellent job.

[@clarabenedett7275]

Hey hey! I LOVE your reviews! Just got my Apple Watch SE 2nd gen based on your in-depth review. I'm wondering now, is there any App you'd recommend for sleep tracking/analysis with the Apple watch? The Health app is so shallow on the iPhone, I wanted something with more data and recommendations. I'm currently using SleepCycle, Pilow and SleepWatch - all as free versions, to understand which would be best. But I'm wondering if you already have one that you'd recommend? Thank you!!

[@Mrgasman1978]

Thanks for sharing all this awesome contents!! So basically, as far as i understood, correct sleep tracking in smartwatches is more related to good softwares and well studied algorithms, than high tech hardware.

[@aliticx]

You’re the reason i got an apple watch last month, a used series 9 for $300. I like it.

[@tmr2757]

The galaxy watch 7 ultra is out , looking forward to your review 👍🏽

[@DrFeelgood1234567]

Thank you. May the algoriddim be with you 🤟🏻

[@MondSemmel]

I really loved the clever intro sequence! And in general, I really loved this video in terms of both content and presentation. This kind of video fits perfectly into your channel, and I'm looking forward to seeing more videos in this style! Finally, to provide some minor constructive criticism, the accompanying music piece at the start of the video sounded extremely generic to me.

[@neosam]

Thank you for this video and for putting all the effort in it! Just one question: How do you know that the Apple Watch uses only motion data for sleep tracking?

[@bengodgundam]

Please review the new galaxy ring once its available! felt like Samsung has been doing a terrible job a tracking, would really be informative to know if it is accurate this time

[@carmig00]

Great idea and nicely crafted review. Just wondering why you picked a rather out dated version of e.g. Garmin Fenix. By now they have version 7, with better sensor technology. You’re comparing it to a fairly new Apple Watch 8. Is this accounted for?

Please review Galaxy Ring

[@TheQuantifiedScientist]

Unfortunately Samsung does not send me products, and the ring is not available here, so jumping through hoops to buy one...

[@jamil027]

​@@TheQuantifiedScientistJumping through rings like Sonic

[@Superfmrs]

Wowww i did not know the skin tempersture vs body temperature differencess! Thankssss

[@sreejinair]

Hey Rob when are you testing the Galaxy Watch Ultra and the Galaxy Ring.

[@stephanepecqueux2821]

Waiting anxiously for your review of: - Galaxy Watch 7 - Galaxy Watch Ultra - Galaxy Ring

[@balubalaji9956]

12:50 as a ML engineer I can say that Apple engineer made a superior algorithm

[@OneIdeaTooMany]

This is awesome. I think one addition could be indicating on the graph whether the device requires a subscription in order to track your sleep. I'm on android so apple watches are out of the question but I also don't want to pay a subscription. so that rules out the Oura ring and the H10 I guess..

[@mikayel18ify]

Hi Rob, when do you think you can review the new Samsung Galaxy ring ? Thank you ❤

[@J.Argueta]

Very informative video. I have both the Apple Watch Ultra 2 and the Fitbit Charge 6. I see very, very different data when I sleep and wonder which one of those two is more accurate. The Ultra 2 tends to state I’ve slept longer, and I’m shocked that the Charge 6 says I’ve slept less. Based on how I physically feel (as opposed to emotionally), I tend to think that the Charge 6 is more accurate. Id like to find some confirmation on that

[@_busybee23]

Damn, sir. Your in-depth analysis was bang on. Keep up the good work.

[@Shambolic2000]

Great video. Clear and well organised, with useful information and insights. One idea for a future video, maybe you could go through your recommendations for third party apps that do utilise Apple’s dataset well, and compare features/utility?

[@expierreiment]

I bought the Apple Watch SE 2 based on your findings specifically for sleep tracking. And I have the strong feeling that the algorithm does not work well for my case. I lie away motionless for long periods and it thinks I'm asleep.

[@Zufriedenheit]

Thanks for you work. Very Informative! One correction though: In the release notes for WatchOS 9 it says that it uses motion and heart rate to detect sleep stages. So it does not use only motion like suggested in this video.

[@AHMED-gs8wr]

Review for Galaxy watch &Ultra and ring please, before Amazon Prime offers End 😢😢 cuz "I trust your magnificent Review " only you i trust

[@timmorrowThailand]

Hello! I am a follower and proud to be one of your fans! Can you tell me if you will review the Suunto watch for sleep? I live in Thailand and this wearable is becoming popular. I am primarily interested in the sleep tracking accuracy. Thanks for your valuable videos you create for us!

[@EgidioLista]

when you're going to review the new samsung galaxy watch 7 on heart activity monitoring and sleep tracking? you're the best, thanks!

[@정해인-f3n]

I'm really looking forward to the Galaxy Watch7 review you'll

[@IakonaWayne]

can't wait for the review of the new samsung wearables .

[@bliipfert]

Please consider testing the sleep tracking features of the Muse S headband. Thanks!

[@wowwow2622]

Please review the samsung galaxy ring!!!

[@xsiviso4835]

Thanks for your videos! I heard form people who using the new iOS Beta, that sleep tracking got even better. Could be interesting in the future.

[@soham769]

Please review Samsung vs Oura vs Ultrahuman vs RIngconn rings next

[@cr8xtremeCaRnAgE]

I have been using Amazfit Stratos since 2018 and I believe the statistics is accurate enough. I don't need to buy a device that's 4 times expensive and marginally improves details by 10%. It's just sleep, if I am getting enough and captured properly it's all good.

[@ธนกรภูริวรางคกูล]

What kind of sleep disorder are cause effect in this?Could you example plz. thx u

[@JamBox-zy5se]

yeah, I am never still according to every sleep tracker ever, but seem to be pretty healthy.

[@haziq3636]

Very interesting stuff. Perhaps can you make a video explaining how apple watch and other wearables estimate VO2 Max

[@tamataeo]

Thank you Rob for this amazing video! Just had one question: how can you be sure that Apple Watch doesn’t use heart rate, where did you see that it only uses accelerometers ?

[@DAVIDLEE-ob8ek]

The Galaxy Watch7 was released. It has been announced that the performance has improved a lot. Please compare heart rate..etc with other smart watches

[@jesherkiwwa4748]

Huawei Watch Fit 3 full review, when?

[@anettepercy8879]

I really enjoy your reviews! Thank you for all de data and tests!! I´ve watched all of them I think :-) Since I learned about the oura ring(from you) and the great analysis it can give you on your sleep, I of course now know that there are other rings as well. I would love to see you comparing the Ultrahuman ring and the ringconn vs the oura ring. Would that be possible for you to do? I think

[@gavriilbs5443]

Very nice testing, but how apple watch se is better than ultra?

[@_renze_]

Hi Rob, how good of a job do this smart watch do when sleeping next to a partner in the same bed? Especially the Apple Watch that merely uses movement. Thanks

[@leoceoliveira]

and where can we buy/how much does the dreem eeg device cost?

[@mariusmander]

Hey I would be very interested in a video that teaches to interpret the health data that the apple watch tracks. Did you make a video or can you recommend a video or literature regarding this topic?

[@nick024]

excited for the vitals app video!!!

[@johnarildramberg3132]

I’m currently testing watchOS 11, and it’s very very good!

[@wschozo]

I noticed Muse S appearing here and there from your videos being used alongside other equipments. How good is Muse S is for sleep tracking by itself? That one seems to be the most available EEG based sleep tracker.

[@commonmadeholy]

Great video as always thanks! Please could you add to your list to test the Suunto Race S? 😊

[@AdamBloodgood]

Your videos are great! Thank you for sharing and hello from LA.

[@piotrnowakowski7175]

Hey Rob! Thanks for ultra detailed reviews! You're doing a great job. Did you hear any rumors about possible Fitbit Sense 3 release? I have Sense 1 and I'm looking for something new, which will track my sleep on similar level but has improved heart rate tracking. I don't want to go with Apple Watch, because the battery life is ridiculous for me. For now I don't see any good alternative for my Fitbit Sense

[@MrAnonimR]

I really hope you will have the time to review the galaxy ring

[@SorenaAmini]

Great channel! How accurate are chest straps? Would be interesting to compare it to something that is even more accurate or compare different cheat straps (because if they are accurate they should show similar results

[@GK-qc5ry]

Fascinating analysis, well done Rob.

[@davionknight521]

Waiting for Galaxy watch 7 and 7 ultra review 😁

[@BrickCity-o1n]

Ultrahuman ring please!

[@george6252]

Agreed, I'm starting to suspect he is a Oura Ring Sponsor. Supposed to be about Apple watch but half is on Oura Ring. Loosing trust.

[@Snowmans.Cradle]

@@george6252You do understand he can’t check all of them? :)

[@T0M3R07]

@@Snowmans.Cradle Rob wore an Ultrahuman ring 10 months ago (Galaxy Watch 6 review) but stopped. Not sure why.

[@D-..Starck]

@@george6252 7:51 he actually explains why though

[@andretheseal9837]

I’m getting 0-30 min of deep sleep with the AW9 after coming from whoop 4.0 which gave me typically around 1.5 hours but as high as 2-2.5. Any ideas? It’s too great of a variance to me to not think something is wrong.

[@shottskies]

Goes to show that these technologies have a long way to go to be reliable

[@TheBigKing0]

Cmon Apple! Release a fitness tracker with a weeks battery already

[@iliaghp]

Your reviews are amazing! Thank you.

[@NikoSaario]

You're the only reason why I might switch to apple watch 👍

[@randomnobody8770]

Id say its worth it, but depends on the person. The SE is like $250 and performs as well as all other models. I wouldn't trade more battery life for any diminishment of any features, but I do wish it had more battery. I got so used to charging it like we all got used to charging our phones. I got mine configured to last at least 24 hours on average, and use it as a tool to tell time, find my phone in an instant, gets a small selection of notifications and messages, go the the gym without my phone, display my steps so I walk more, and set cooking times. I should prob track sleep, but I found set up to be a pain. Kept leaving sleep mode on and missing messages.

[@BillFalck]

Thank you for this info. I really appreciate your quantitative approach and insights!

[@bloodrabbid]

And what about people who can't sleep properly anymore? Which way should I at least dig ? Standard recommendations by type - go to bed earlier, do not eat 3 hours before bedtime, etc., no longer work

[@212roblox212]

Can you do a video on the new Samsung Ring?

[@TheBestEpicProGamer]

Great insights! Thank you for your awesome videos. I never thought that I buy an apple watch, but the sleep/sport/habit tracking is amazing and I am happy with it.

[@khairilfaiz25]

Please also review Xiaomi Band 7 and 8 😁. A cheap yet have so many features like the more expensive watch. Would be very appreciated.

[@Donald5557_]

When you have time Withings seems to be introducing a new algorithm could you do a full review on the ScanWatch 2? Thanks so much and love what you do.

[@FastRedPonyCar]

It'll be interesting to see how the sleep apnea tracking on the apple watch turns out to be.

[@5didier5]

Thanks!

[@Buckstein11]

Awesome

[@havan17]

Request!!! Can you please also make a comparison for the Samsung Fit 3 vs CMF watch pro 2

[@BIGaziz7]

do the samsung ring please

[@DBR6464]

I have the Oura 3 and Apple Watch. They are both great for sleep, but for some reason my Oura ring is usually records 10-30 min less than my Apple watch. I'm not sure which one is more precise. It may be somewhere in between the two. I sleep with both because of the alarm clock on the watch.

[@Kasenkow]

Hi Rob! Why don't you use body composition accuracy as one of the KPIs you compare the devices on? The body fat %, muscle mass, etc.

[@Mowikan]

I love the apple ultra and I use to own one. But if you are like to swim and do some training the apple watch can’t do something simple as: ever x-lanes(haptic feedback)a warning as long as you swim. Only Garmin can do this. And so i use the fenix7, unfortunately.

[@nilsobach2659]

Hey, can you please make a video where you compare the Apple Watch with the Athlytic app against Whoop? :)

[@gabnrami]

Thanks for all your dedication and info you are a great reviewer

[@zouaghiahmed22]

Can you review the aktiia band please ? Hypertension monitor approved in Europe but using sensors not cuffs. Should be interesting for you. Have been using it for months now seems like a good device

[@rodrigorios3271]

Apple uses the accelerometer to measure respiratory rate which varies during different sleep stages. Note that the respiratory rate feature was introduced before sleep tracking with sleep stages. 😉

[@ZePedro4259]

Hi Rob! Are you planning on reviewing the Galaxy Watch FE?

[@Me-eb3wv]

Yes

[@giridharjoshi7794]

can you please review Philips smart sleep

[@smarterphone6863]

Hi can you do a review on oneplus 2r

[@smarterphone6863]

Hi please review oneplus watch 2r

[@adityamehta4478]

Waiting for the watch 7 details

[@Dans.Place1]

Why am I watching this instead of sleeping? Sounds like such an interesting video though ! 😂❤

[@jamil027]

His soothing voice has actually helped me fall asleep... To a video about smartwatches and sleep tracking.

[@tudornic]

Bro we need samsung ring review