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How the Apple Watch Tracks Your Sleep (Scientific Review)

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The Quantified Scientist

The Quantified Scientist

Күн бұрын

Пікірлер: 346
@TheQuantifiedScientist
@TheQuantifiedScientist Ай бұрын
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@kroz7682
@kroz7682 Ай бұрын
Great video. Would you say the series 4 Apple Watch is still accurate or is it time to get the 9 ?
@danielmoksmann5654
@danielmoksmann5654 Ай бұрын
Waiting anxiously for your review of: - Galaxy Watch 7 - Galaxy Watch Ultra - Galaxy Ring (Maybe in the same video)
@Excog_
@Excog_ Ай бұрын
The Galaxy ring is the most important one, I think. It is its main selling point.
@ama-tu-an-ki
@ama-tu-an-ki Ай бұрын
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
@212roblox212 Ай бұрын
Yess Samsung Galaxy Ring
@tiago4599
@tiago4599 Ай бұрын
Yeeeeees
@williams4057
@williams4057 Ай бұрын
@@ama-tu-an-ki The regular watch 7 also has the new upgraded sensors too.
@Etb323
@Etb323 Ай бұрын
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
@donpeleas4780 Ай бұрын
in other words, you don't need a watch to tell you whether you slept well or not.
@TheQuantifiedScientist
@TheQuantifiedScientist Ай бұрын
Thanks for sharing!
@suzzzzzzzzzzzz
@suzzzzzzzzzzzz 28 күн бұрын
Confirmation bias??
@ZeDarkLord
@ZeDarkLord Ай бұрын
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
@paulstejskal Ай бұрын
Agreed. This is very helpful.
@5ervalkat192
@5ervalkat192 Ай бұрын
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.
@mixy2647
@mixy2647 Ай бұрын
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…
@MrActiveservo
@MrActiveservo Ай бұрын
So interested to see Galaxy Watch 7 with the upgraded sensors!
@Metalmachine18
@Metalmachine18 Ай бұрын
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
@sexypizza7729 Ай бұрын
Any suggestions for such an app?
@deandawiz
@deandawiz Ай бұрын
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
@Metalmachine18 Ай бұрын
@@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
@lolitsgavin1315 17 күн бұрын
@@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
@Allex46 6 күн бұрын
@@deandawiz autosleep
@shinheejung6258
@shinheejung6258 Ай бұрын
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.
@Ask-Ali
@Ask-Ali Ай бұрын
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
@Soundwave857 Ай бұрын
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
@Ask-Ali Ай бұрын
@@Soundwave857 yup! It’s confirmed. Idk why they’d tell you that lol. That definitely wasn’t the case before
@andretheseal9837
@andretheseal9837 Ай бұрын
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
@rutepereira7628 Ай бұрын
Same here!
@Zomboy4313
@Zomboy4313 Ай бұрын
@@Ask-AliI think it worked on watchOS 7-8 before they added the more complex sleep tracking
@DAVIDLEE-ob8ek
@DAVIDLEE-ob8ek Ай бұрын
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
Ай бұрын
Please review Galaxy Ring
@TheQuantifiedScientist
@TheQuantifiedScientist Ай бұрын
Unfortunately Samsung does not send me products, and the ring is not available here, so jumping through hoops to buy one...
@jamil027
@jamil027 Ай бұрын
​@@TheQuantifiedScientistJumping through rings like Sonic
@TheKix0u
@TheKix0u Ай бұрын
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!
@danilos7195
@danilos7195 Ай бұрын
Hello, could you do the test on the new Galaxy Watch 7, with the new sensors? Thanks
@netmanswe
@netmanswe Ай бұрын
The effort you put into analysing all these devices is astounding. Thank you for making it available to everyone.
@IndritSelimi
@IndritSelimi 15 күн бұрын
Ok good that Oura is sponsoring you
@stephanepecqueux2821
@stephanepecqueux2821 Ай бұрын
Waiting anxiously for your review of: - Galaxy Watch 7 - Galaxy Watch Ultra - Galaxy Ring
@tmr2757
@tmr2757 Ай бұрын
The galaxy watch 7 ultra is out , looking forward to your review 👍🏽
@AdamBloodgood
@AdamBloodgood 11 күн бұрын
Your videos are great! Thank you for sharing and hello from LA.
@DrFeelgood1234567
@DrFeelgood1234567 Ай бұрын
Thank you. May the algoriddim be with you 🤟🏻
@davionknight521
@davionknight521 Ай бұрын
Waiting for Galaxy watch 7 and 7 ultra review 😁
@AHMED-gs8wr
@AHMED-gs8wr Ай бұрын
Review for Galaxy watch &Ultra and ring please, before Amazon Prime offers End 😢😢 cuz "I trust your magnificent Review " only you i trust
@5didier5
@5didier5 Ай бұрын
Thanks!
@sreejinair
@sreejinair Ай бұрын
Hey Rob when are you testing the Galaxy Watch Ultra and the Galaxy Ring.
@stevecohen161
@stevecohen161 Ай бұрын
Rob, I appreciate your work and diligence. Thank you ... Steve
@Superfmrs
@Superfmrs Ай бұрын
Wowww i did not know the skin tempersture vs body temperature differencess! Thankssss
@IakonaWayne
@IakonaWayne Ай бұрын
can't wait for the review of the new samsung wearables .
@soham769
@soham769 Ай бұрын
Please review Samsung vs Oura vs Ultrahuman vs RIngconn rings next
@bliipfert
@bliipfert 14 күн бұрын
Please consider testing the sleep tracking features of the Muse S headband. Thanks!
@MondSemmel
@MondSemmel Ай бұрын
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.
@andretheseal9837
@andretheseal9837 Ай бұрын
I’m getting 0-30 min of deep sleep with the AW9 after coming from whoop 4.0 which gave me typically around 2.5 hours but as high as 4.5-4. Any ideas? It’s too great of a variance to me to not think something is wrong.
@smarterphone6863
@smarterphone6863 Ай бұрын
Hi can you do a review on oneplus 2r
@frendster1000
@frendster1000 Ай бұрын
Why am I watching this instead of sleeping? Sounds like such an interesting video though ! 😂❤
@jamil027
@jamil027 Ай бұрын
His soothing voice has actually helped me fall asleep... To a video about smartwatches and sleep tracking.
@wowwow2622
@wowwow2622 Ай бұрын
Please review the samsung galaxy ring!!!
@aliticx
@aliticx Ай бұрын
You’re the reason i got an apple watch last month, a used series 9 for $300. I like it.
@sergeydobrovolskiy4268
@sergeydobrovolskiy4268 Ай бұрын
Very interesting to saw a test of Casio with Polar Sensors 🙏
@nick024
@nick024 Ай бұрын
excited for the vitals app video!!!
@johnarildramberg3132
@johnarildramberg3132 Ай бұрын
I’m currently testing watchOS 11, and it’s very very good!
@lovethytuber4770
@lovethytuber4770 Ай бұрын
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.
@bengodgundam
@bengodgundam Ай бұрын
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
@carmig00 Ай бұрын
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?
@itsbdullah
@itsbdullah Ай бұрын
Really appreciate how thorough your videos are!
@user-nh6dj8id8b
@user-nh6dj8id8b Ай бұрын
I'm really looking forward to the Galaxy Watch7 review you'll
@Caelo_music
@Caelo_music Ай бұрын
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.
@_busybee23
@_busybee23 25 күн бұрын
Damn, sir. Your in-depth analysis was bang on. Keep up the good work.
@jopu
@jopu Ай бұрын
waiting for galaxy watch ultra review and galaxy watch 7
@cr8xtremeCaRnAgE
@cr8xtremeCaRnAgE 7 күн бұрын
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.
@tudornic
@tudornic Ай бұрын
Bro we need samsung ring review
@haziq3636
@haziq3636 27 күн бұрын
Very interesting stuff. Perhaps can you make a video explaining how apple watch and other wearables estimate VO2 Max
@neosam
@neosam 28 күн бұрын
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?
@BIGaziz7
@BIGaziz7 Ай бұрын
do the samsung ring please
@MrAnonimR
@MrAnonimR Ай бұрын
I really hope you will have the time to review the galaxy ring
@mikayel18ify
@mikayel18ify Ай бұрын
Hi Rob, when do you think you can review the new Samsung Galaxy ring ? Thank you ❤
@user-sr8jn1fd2s
@user-sr8jn1fd2s Ай бұрын
Ultrahuman ring please!
@george6252
@george6252 Ай бұрын
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
@Snowmans.Cradle Ай бұрын
@@george6252You do understand he can’t check all of them? :)
@T0M3R07
@T0M3R07 Ай бұрын
@@Snowmans.Cradle Rob wore an Ultrahuman ring 10 months ago (Galaxy Watch 6 review) but stopped. Not sure why.
@D-..Starck
@D-..Starck Ай бұрын
@@george6252 7:51 he actually explains why though
@212roblox212
@212roblox212 Ай бұрын
Can you do a video on the new Samsung Ring?
@jesherkiwwa4748
@jesherkiwwa4748 Ай бұрын
Huawei Watch Fit 3 full review, when?
@Luigi_Vaz
@Luigi_Vaz Ай бұрын
If you had the chance to test the Galaxy Watch 7... :)
@bojtetamas47
@bojtetamas47 Ай бұрын
@Rob when galaxy ring ??
@user-hw1yx4bu1k
@user-hw1yx4bu1k Ай бұрын
What kind of sleep disorder are cause effect in this?Could you example plz. thx u
@JamBox-zy5se
@JamBox-zy5se Ай бұрын
yeah, I am never still according to every sleep tracker ever, but seem to be pretty healthy.
@iliaghp
@iliaghp Ай бұрын
Your reviews are amazing! Thank you.
@Zomboy4313
@Zomboy4313 Ай бұрын
I like how in watchOS 11 it can track sleeping with naps instead of only during sleep focus
@J.Argueta
@J.Argueta Ай бұрын
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
@adityamehta4478
@adityamehta4478 Ай бұрын
Waiting for the watch 7 details
@smarterphone6863
@smarterphone6863 Ай бұрын
Hi please review oneplus watch 2r
@Edameda_mmori
@Edameda_mmori Ай бұрын
Redmi watch 4 review please
@DBR6464
@DBR6464 25 күн бұрын
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.
@sharonwood8085
@sharonwood8085 11 күн бұрын
I have narcolepsy and wondered if you have any idea how sleep trackers would work for someone like me please? Thank you
@UnosofManila
@UnosofManila Ай бұрын
What sleep issues affect the accuracy of sleep trackers? I'd like to know if I am a healthy sleeper
@PeterOleniuk
@PeterOleniuk Ай бұрын
Could you review CMF Watch Pro 2 it looks very interesting!!!
@justicerachel
@justicerachel Ай бұрын
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
@stijndevries Ай бұрын
With the next watchOS version it doesn’t need a schedule anymore
@MonikaSw
@MonikaSw Ай бұрын
Yeah, tbh my Xiaomi Band 7 could better track the sleep. The AW sleep detection is shit, but the rest is awesome.
@justicerachel
@justicerachel Ай бұрын
@@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
@justicerachel Ай бұрын
@@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
@stijndevries Ай бұрын
@@justicerachelno, it’s for all models with the upcoming watchOS 11. It now always runs in the background.
@wschozo
@wschozo Ай бұрын
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.
@OneIdeaTooMany
@OneIdeaTooMany Ай бұрын
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..
@khairilfaiz1914
@khairilfaiz1914 Ай бұрын
Please also review Xiaomi Band 7 and 8 😁. A cheap yet have so many features like the more expensive watch. Would be very appreciated.
@nilsobach2659
@nilsobach2659 24 күн бұрын
Hey, can you please make a video where you compare the Apple Watch with the Athlytic app against Whoop? :)
@Kaz-qz2oq
@Kaz-qz2oq Ай бұрын
Would you ever be open to testing the OnePlus Watch 2?
@shawnspring4824
@shawnspring4824 Ай бұрын
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.
@Zufriedenheit
@Zufriedenheit Ай бұрын
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.
@xsiviso4835
@xsiviso4835 Ай бұрын
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.
@jackc676
@jackc676 21 күн бұрын
Please test 3rd party apps for apple!!
@havan17
@havan17 Ай бұрын
Request!!! Can you please also make a comparison for the Samsung Fit 3 vs CMF watch pro 2
@ListonCrest
@ListonCrest Ай бұрын
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.
@jeanviloria1988
@jeanviloria1988 28 күн бұрын
3:22 the veinsss
@user-jo6wh6it2k
@user-jo6wh6it2k Ай бұрын
The level of glazing is supreme
@expierreiment
@expierreiment Ай бұрын
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.
@Kasenkow
@Kasenkow Ай бұрын
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.
@suriyariya8107
@suriyariya8107 Ай бұрын
Do Ultrahuman air ring
@khanbahadurshah6989
@khanbahadurshah6989 Ай бұрын
Where is Huawei watch ?
@DW55n
@DW55n Ай бұрын
I hope you make tease for galaxy watch 6 classic after update oneui 6 . I want see any improvements.
@NikoSaario
@NikoSaario Ай бұрын
You're the only reason why I might switch to apple watch 👍
@randomnobody8770
@randomnobody8770 Ай бұрын
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.
@jdjaidev
@jdjaidev Ай бұрын
Really informative.. Thanks ❤
@chusti1054
@chusti1054 Ай бұрын
Hello Rob, please test the amazfit helio ring 😮😮😮😮
@Mrgasman1978
@Mrgasman1978 Ай бұрын
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.
@EgidioLista
@EgidioLista Ай бұрын
when you're going to review the new samsung galaxy watch 7 on heart activity monitoring and sleep tracking? you're the best, thanks!
@bledig
@bledig 2 күн бұрын
How does withings nova compare to apple for sleep?
@commonmadeholy
@commonmadeholy Ай бұрын
Great video as always thanks! Please could you add to your list to test the Suunto Race S? 😊
@ghostlyskunk4226
@ghostlyskunk4226 Ай бұрын
what about the Apple Watch SE first generation?
@timmorrowThailand
@timmorrowThailand Ай бұрын
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!
@gemarose9215
@gemarose9215 Ай бұрын
Great video, super informative and helpful!
@LeonardoDonofrw
@LeonardoDonofrw Ай бұрын
Miband 8 pro vs huawei band 9
@GK-qc5ry
@GK-qc5ry Ай бұрын
Fascinating analysis, well done Rob.
@TheBestEpicProGamer
@TheBestEpicProGamer Ай бұрын
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.
@voodooparadox2513
@voodooparadox2513 Ай бұрын
Please review the Muse S for sleep. It uses EEG. We want a Dreem headband alternative.
@MMAneuver
@MMAneuver Ай бұрын
I second this!!! What's the point in all these trackers that use HRV but don't use ecg and only use optical LOL it's surely a con. Only way to do it must be EEG!
@brianquigley1940
@brianquigley1940 Ай бұрын
I third this. I wear a Muse S headband and its somnographs usually aligned well with the Dreem 2 headband I wore at the same time. (Dreem headbands are no longer consumer products.) I have yet to find a study anywhere that compares the Muse S somnograph with another clinical standard device.
@MMAneuver
@MMAneuver Ай бұрын
@brianquigley1940 could you give us an honest review on the muse s? Do you think it's worth it? I'm an athlete and I'd really like to understand and nail my sleep better! (I also have a minor interest in lucid dreaming too)
@brianquigley1940
@brianquigley1940 Ай бұрын
@MMAneuver The somnograph is trustworthy. The device was initially sold as a meditation "helper". I also use it for that purpose. e.g. it shows me whether I nodded off during a session or was in the "zone". The recent update that shows brain wave bands (alpha, delta, gamma, etc.) makes a huge difference. I wore both a Dreem 2 (also used by Rob) and a Muse S for about six months (until the consumer Dreem website was taken down). The somnographs were usually very similar. The main differences were in deep sleep, which were not always perfectly aligned, and the Muse did not record short bathroom breaks on the somnograph. I also wear a Fitbit and Polar watch on my left arm... for the HRV. If I get a decent amount of deep sleep and my HRV correlates well on both watches as high, I know my body is well prepared for a long run. I have two issues with the Muse S headband. The sensory part of the headband wears out quickly. I've gone through FOUR replacements in ONE year, all covered by the warranty. They say they are working on an improved version. The second issue is that the company's primary target audience seems to be... how can I say this politely... the "crystal waving" crowd. e.g. the subscription gives you access to celebrity meditation gurus, etc. Their focus is not on sleep... except for the recent udpate, which gives me hope. You will find a lot of scientific references on their website. They also offer an SDK (software development kit) for people interested in accessing the EEG data, but it's only for iOs. If I could find a commercial EEG product dedicated solely to sleep, I would buy it. I would still use my Muse S for meditation. My guess is that the Dreem 2 and Muse S use very similar hardware. Mind Monitor is an Android app you can download for the Muse. You can monitor your brain waves in real time by bandwidth. I've used it to practice "flattening" my brain waves to train myself to quieten my mind as prep for going to sleep. You can save your data and process it... if you have the necessary coding/analytical skills/knowledge.
@brianquigley1940
@brianquigley1940 Ай бұрын
@MMAneuver I wrote an extensive response and it was deleted! Weird. The somnograph is trustworthy. The headbands wear out quickly within months. The battery only lasts 7.5 hours.
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