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 ?

[@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.

[@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…

[@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.

[@MrActiveservo]

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

[@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

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

[@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.

[@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!

[@stephanepecqueux2821]

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

[@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.

[@5didier5]

Thanks!

[@tmr2757]

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

[@stevecohen161]

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

[@DrFeelgood1234567]

Thank you. May the algoriddim be with you 🤟🏻

[@soham769]

Please review Samsung vs Oura vs Ultrahuman vs RIngconn rings next

[@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

[@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.

[@Edameda_mmori]

Redmi watch 4 review please

[@davionknight521]

Waiting for Galaxy watch 7 and 7 ultra review 😁

[@nick024]

excited for the vitals app video!!!

[@johnarildramberg3132]

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

[@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

[@FastRedPonyCar]

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

[@itsbdullah]

Really appreciate how thorough your videos are!

[@Superfmrs]

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

[@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?

[@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

[@LeonardoDonofrw]

Miband 8 pro vs huawei band 9

[@IakonaWayne]

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

[@jopu]

waiting for galaxy watch ultra review and galaxy watch 7

[@insidethecourt]

I imagine most people who, like me, get the Apple Watch specifically for sleep tracking are interested in fixing and improving their sleep. However it seems most of these devices are terrible at documenting abnormal sleep. So it begs the question, what's the point of using a sleep tracker if it only works for normal healthy sleepers... It'll be interesting to see how well the sleep apnea feature works on the Apple Watch Series 10. That'll sorta be a Rorschach test for sleep tracker effectiveness.

[@Zomboy4313]

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

[@sreejinair]

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

[@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.

[@aliticx]

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

[@정해인-f3n]

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

[@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.

[@wowwow2622]

Please review the samsung galaxy ring!!!

[@jesherkiwwa4748]

Huawei Watch Fit 3 full review, when?

[@tudornic]

Bro we need samsung ring review

[@smarterphone6863]

Hi please review oneplus watch 2r

[@BIGaziz7]

do the samsung ring please

[@dottkaccia]

Please test the new Samsung galaxy watch 7 🙏😁

[@gemarose9215]

Great video, super informative and helpful!

[@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.

[@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.

[@adityamehta4478]

Waiting for the watch 7 details

[@iliaghp]

Your reviews are amazing! Thank you.

[@jdjaidev]

Really informative.. Thanks ❤

[@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.

[@Luigi_Vaz]

If you had the chance to test the Galaxy Watch 7... :)

[@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.

[@212roblox212]

Can you do a video on the new Samsung Ring?

[@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?

[@_busybee23]

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

[@MrAnonimR]

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

[@smarterphone6863]

Hi can you do a review on oneplus 2r

[@mikayel18ify]

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

[@bojtetamas47]

@Rob when galaxy ring ??

[@AdamBloodgood]

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

[@ruijikisu]

if the apple watch didnt require an iphone i would get one but there are reasons i dont already have one as a daily phone so essentially this just adds the cost of a new iphone to the otherwise reasonable cost of the watch so i really hope competitors get close to the apple watch soon in terms of tracking

[@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. 😉

[@khairilfaiz1914]

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

[@gabnrami]

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

[@sharonwood8085]

I have narcolepsy and wondered if you have any idea how sleep trackers would work for someone like me please? Thank you

[@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.

[@Demario-t4g]

The level of glazing is supreme

[@GK-qc5ry]

Fascinating analysis, well done Rob.

[@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

[@jackc676]

Please test 3rd party apps for apple!!

[@Aashishkebab]

Third party tracker Sleep as Android also only uses accelerometer.

[@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..

[@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.

[@suriyariya8107]

Do Ultrahuman air ring

[@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?

[@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.

[@sergeydobrovolskiy4268]

Very interesting to saw a test of Casio with Polar Sensors 🙏

[@sendscho2260]

is it just the software of the watchOS that gives the good results? so will apple watch 7,8 and 9 be equally accurate?

[@nilsobach2659]

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

[@Kaz-qz2oq]

Would you ever be open to testing the OnePlus Watch 2?

[@shawnspring4824]

I asked too. As an owner of one, I can tell you the sleep tracking is not great, but do find the activity tracking and heart rate tracking to be comparable with my Apple Watch Ultra.

[@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.

[@justicerachel]

Do I understand correctly that a key determinant of it working correctly is to provide it with your sleep SCHEDULE. ahead of time? I ask because many people do not have set sleep/wake schedules or have a sleep disorder or other sleep problem. Fitbit is able to properly detect sleep/wake without doing this, even for naps (and catches the sleep stages if you are down for more than 3 hours).

[@stijndevries]

With the next watchOS version it doesn’t need a schedule anymore

[@MonikaSw]

Yeah, tbh my Xiaomi Band 7 could better track the sleep. The AW sleep detection is shit, but the rest is awesome.

[@justicerachel]

@@stijndevries, thank you! I want to make sure I understand. I think you are saying I would need to buy the newest model when it comes out vs. buying one of the existing models that has already performed well in Rob's testing. I am wanting to move out of the Google/Fitbit ecosystem (is the reason I ask), and I don't want to need a subscription.

[@justicerachel]

@@MonikaSw I saw someone saying this same thing on Reddit! Fitbit has mostly done well at detecting my sleep, but sometimes I need to edit the start and end times. Problem is, they got rid of the Windows app, and now they're getting rid of the online dashboard, and I cannot use their mobile app. It's bad.

[@stijndevries]

@@justicerachelno, it’s for all models with the upcoming watchOS 11. It now always runs in the background.

[@jeanviloria1988]

3:22 the veinsss

[@bliipfert]

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

[@_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

[@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.

[@PeterOleniuk]

Could you review CMF Watch Pro 2 it looks very interesting!!!

[@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.

[@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.

[@DW55n]

I hope you make tease for galaxy watch 6 classic after update oneui 6 . I want see any improvements.

[@khanbahadurshah6989]

Where is Huawei watch ?

[@scimmiaditarzanello]

Review of Helio ring, ringconn and ultrahuman?

[@NOT_NativeEN_Speaker]

Thx Rob 🙏 Superb video as always 👏

[@MeneerSpaghetti]

I'm still using an Apple Watch Series 6, and I don't find it accurate for tracking my sleep. The Oura Ring 2 also fails to detect when I'm awake during the night. Has the hardware in newer Apple Watches for detecting sleep changed, or is it all similar with just an updated algorithm?

[@pixelgaming7261]

Since they only have quoted 18 hours of battery life, if they used the heartrare sensor, it could die during the night and not track all your sleep.

[@gabnrami]

??? Do u sleep 18hs? If you only use the device for sleep tracking and weight lifting like me, the watch can last between 30-40hs (notifications off). Also you can charge it midday or before sleeping…

[@pixelgaming7261]

@@gabnrami If you use it normally then it might.

[@rohanlg790]

The map looks exactly like Fitbit