Mi Band 8 International : Scientific Test

[@TheQuantifiedScientist]

🔴 Get a Mi Band 8*: geni.us/MiBand8_international 🔴 General Amazon link*: geni.us/thequantifiedscientist 🔴 Thanks to www.techpunt.nl for sending me this Mi Band 8 early, so I could get this review out relatively quickly. Check them out if you want to buy this band in Europe (not sponsored). 🟢 Instagram: instagram.com/quantified_scientist/ 🟠 Shorts: studio.kzbin.info/door/cpARGzXNaC62UQWns2dh2Q 🔵 Newsletter: www.robterhorst.com 🟡 Twitter: @QuantifiedRob * Affiliate (paid) links support the channel by earning me a commission on any sale, and it doesn't cost you any more! My opinions are completely my own, and this content is not sponsored. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 👇 $30 off any new WHOOP membership, affiliate* (paid) link, supports the channel!👇 join.whoop.com/QuantifiedScientist ($30 off any new WHOOP membership) ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 👇Amazon Affiliate* (paid) links. Supports the channel, doesn't cost you any more!👇 ▬▬▬▬▬▬▬▬▬▬BEST WATCHES▬▬▬▬▬▬▬▬▬▬ 🔴 Oura Link: I recommend you search for a discount on reddit with the "Refer-A-Friend" program! If you can’t find one: ouraring.sjv.io/rQ4L33 (affiliate link that supports the channel, but doesn't have a discount) 🔴 Whoop Strap 4.0: join.whoop.com/QuantifiedScientist ($30 off any new WHOOP membership) 🔴 Eight sleep 200$/150$ discount*: eight-sleep.ioym.net/TheQuantifiedScientist + add code “TQS” for 200$/150$ total discount

[@rainerrain9689]

You need to start reviewing foot pods that track many things,stride and cadence just to name a few stats. All you ever test is your biking and sleep data, widen your horizon !

[@primary4075]

Is it just me or is it better to have a correlation analysis rather than a regression? Just show then correlation table. BTW, is it still HUAWEI band better ?

[@MAGAted]

can you recommend a better site for data analysis ?@@rainerrain9689

[@anydugen]

the 8 Pro seems off. If I wear the MiBand 6 and the 8 Pro together, the difference is an overestimation of 28% on the Pro

[@manorho0285]

How did you export the data on band 8 ?

[@famhentea6594]

This level of transparent testing should be the standard for any product on the market. Saves us from falling for sexy marketing videos and instead focusing on the actual function it's supposed to serve. Thank you for taking the time to record and share the results!

[@Matthys70]

Looking forward for a test of the new Mi Band 9. Enjoyed watching this one...

[@393Dima]

when does the test of the mi band 9 come out??

[@OGTennyson]

​@@393Dimait's out now

[@dameanvil]

00:00 🏃 Mi Band 8 International Edition's price ranges between $40 and $60, offering impressive features for the cost. 00:59 🩺 The Mi Band 8 generally shows good agreement with an ECG chest strap for heart rate tracking during indoor cycling, though slight delays in detecting heart rate fluctuations were noted. 03:47 🚴‍♂ The Mi Band 8's performance in heart rate tracking during outdoor cycling is significantly less accurate due to increased wrist tension and movement, resulting in lower correlation. 07:45 🏋‍♂ During weightlifting, the Mi Band 8 struggled to track heart rate accurately due to increased wrist tension, resulting in low correlation and inaccurate readings. 10:47 😴 Sleep stage tracking by the Mi Band 8 had low agreement with an EEG headband, particularly in differentiating deep sleep, light sleep, and REM sleep, making it unreliable for sleep stage tracking. 17:23 🌙 Overall, while suitable for basic heart rate tracking and tracking time spent in bed, the Mi Band 8's sleep stage tracking isn't reliable, receiving a low rating due to discrepancies with reference devices.

[@fridaphonebackup6599]

Thank you 😊

[@manorho0285]

Compared to mi band 7?

[@supertramp5586]

Waiting for Mi Band 9 review

[@AjTle]

Facts

[@393Dima]

Yes

[@jayshukla4926]

Yes, same here

[@NiKaabir]

It's out today.. check..

[@Fremmy]

While I may not be inclined to purchase this device, I genuinely value the content you create and the dedication you invest in producing these videos.

[@AmunBadar]

Stop the yap

[@samedyalcn9142]

Can you draw a correlation vs price chart? It might help us decide which equipment to buy better.

[@guillaumedalle6952]

It's a great idea

[@gammelgemse]

@@guillaumedalle6952 its a terrible idea. Prices vary wildly, even by country, region and such.

[@DefinitelyNotSr.S]

@@gammelgemse Yeah sure, but you can get an idea. Comparing a smart band of ~35€ vs a watch of ~300€ doesn't seem fair :) You have to compare smart bands/watches in the same price range.

[@gammelgemse]

@@DefinitelyNotSr.S I completly disagree. This channel is about comparing technical capabilities and accuracy thereof. This involves a lot of work. Googling for prices you can do youself in 5min.

[@Blashyrkh666Raven]

I do weight lifting (high amateur level) and my heart rate spikes are taken absolutely fine and the range goes from 90 to 140bpm and slightly more as it should. Honestly looking at his graph low heart rate for this activity I would say that there are "issues" in his testing. Don't know if for his anatomy or placement issues. But his findings are definitely not to be taken seriously or for everyone. -

[@maxquaini]

Tbh I'm also having accurate results, pretty much better than the charge 6, maybe our bodies are responding differently

[@CrazyKosai]

3:56 WAIT, how can MiBand7 be in your graph around 0.66 (R) if year ago it had (in the same test in your own video) 0.92 (R)?

[@gammelgemse]

This is very shocking indeed! 🤔

[@aphrodieMonkey]

Not the first time..

[@bottleofclearwater]

I don't see it...

[@jehoiaderabaya8201]

The pricing category is different, hence I expect testing in different aspects too such as in steps including walking and running, stairs, sleep, etc. not so much in intensive and professional activities such as outdoor cycling, gym, tennis, but certainly a plus if it has certain capabilities.

[@MohammedAli-le5go]

Where is the Venu 3 test we have all been waiting for?

[@kake6954]

Exactly

[@MrInferno007]

Yes! I was sure it's going to be the next one

[@FrankvanCaspel]

Heya Rob! I wonder if you have any information about what the 'stress score' that the Mi Band 8 gives is based on. Is it (only) heart rate variability, and do you know of some way to get HRV-data directly from the band? Update: I asked Xiaomi and they said "The watch evaluates the current stress intensity by comparing the current heart rate variability data with the individual's heart rate variability when sleeping and relaxing. It also takes into account the individual's limb activity tracking to assist in the judgment. When heart rate variability is significantly weakened during low-intensity physical activity, it indicates a higher intensity of mental stress. The watch continuously monitors the pressure value changes throughout the day and displays the current pressure value." No idea how they get to the 'mental' part there, but yeah: it's based on HRV, and there's no way to 'reverse engineer' HRV based on the stress score. I'm hoping for an update that'll allow this.

[@Lucas-xp7nm]

Thank you very much for this review. I look forward to the analysis of the new "MiBand 9".

[@timmyo-tool2233]

Thanks so much for the detailed reviews you do!

[@afgaesthetics]

I love your analysis videos, the way you have all datasets from different watches and then comparing them with the new one is awesome, it really gives me hope to continue my journey of learning Data Analysis and Data Science

[@MehediHasan-hc1sc]

Your scientific analyses are excellent. Step count and running distance measurement accuracy test would add extra insight about performance of the watches. Thank you.

[@erb34]

I've heard the previous version of the watch is much more accurate at step counting.

[@xanjelx]

great review dude. the data and presentation blew me away!

[@Omar-kw5ui]

Hey are you planning to test the Mi Smart band 9? Thanks.

[@김정은-w7g]

The heart rate accuracy of Mi Band 8 has improved surprisingly compared to the previous version.

[@TheJeep3000]

Correct but it went from very bad to a little less very bad. So in absolute results, it's still crap. The only difference is time, firmware updates have improved the Mi band 8 a little. I think if the Chinese versions were te-tested they would show similar results.

[@lliliililililililll]

@@TheJeep3000 can you recommend any good device when running with?

[@TheJeep3000]

@@lliliililililililll Huawei Band 8 and the Huawei Watch fit 2 did good on running. The Huawei Health app is also very focused on running. Otherwise the more expensive brands like Garmin. The Garmin app has excellent sport analytics.

[@fridaphonebackup6599]

Check the review of the Fitbit charge 6 by Rob!

[@csirke9822]

It shows my resting heart rate while cycling

[@anydugen]

Can you do a quick update on the step counter please (preferably for the Smart Band 8 Pro)? Mine seems to be SHOCKINGLY inaccurate. There are lots of complaints online as well. Thanks!

[@ucup33]

Venue 3? 😊

[@JonandEva]

Awesome quality video. Thanks for your hard work!

[@QbaGregor]

Good job! 👍👍 Amazing test! When Band 9? 🙃

[@pere_gin]

Do you think using other software/apps for the sleep tracking may improve the sleep tracking performance? Or do you think it's an issue with the hardware/sensors? It would be cool if you tested some popular alternatives, as a lot of times companies cheap out on the software side of less expensive devices. I do understand though that this would increase the testing time and complexity quite a bit. Nice video either way!

[@user-d6b5o9]

The MiBand 7 is good. I think its just Software

[@MoniqueSchüwek]

WOW!! what a great video! I would LOVE to see such from the new Mi Band 9 that just came out! :) It says the heartrate tracking got much better. Also it would be interesting to see the Xiaomi Watch 4 which apparently is pretty good :)

[@ghoste7546]

any chance to test Mi Band 9 as well? Thx

[@McQuack82]

It would be interesting to do some experiments on how much after market band strap replacements change the accuracy. All the high performing watches use are wider displays and straps. Some of the inaccurate readings may be result of just keeping the device in better position more consistently to reduce the false readings more.

[@lukas______]

That seems moreso tightness of band rather than width, though the width could indicate more stability so maybe you're onto something.. I doubt it'd be a significant difference though (width of band)

[@TripleIProductions]

I was considering upgrading to this device. Thank you for the review

[@trilight3597]

I wish I knew earlier. But I know to get a different watch in the future.

[@flaviohemerli6160]

I was afraid that this video would come out after I bought the Huawei Band 8 (largely thanks to your video about it) and show that the Mi Band 8 was better. I'm very happy that, for what I need, this is not the case.

[@QuiteTab]

Do the Huawei band 8 match the expectations so far? I'm thinking of buying it but aside from this review lots of people are not recommending it for it's looks. I know mi band 8 performed horribly but I can't deny that it looks good with it's metal body unlike the plasticity looks from the Huawei band 8.

[@Adam-M1]

@@QuiteTabmi band 7 seems to outperform both on sleep.

[@MrMorton]

Hi Rob, when comparing successor watches, it might be a good idea to show the results compared to the highlighted previous models. This device is a very affordable device and quite impressive for the price and though it'll never compare to an expensive watch many will want to know if they should upgrade their previous model to the new. I think another useful item to include in all of your reviews would be to mention the heart rate sample rate. I used a Mi Band years ago and remember it taking a low number of heart rate measurements per minute and this will dramatically affect its ability to keep up with quick heart rate changes. Love your videos!

[@aphrodieMonkey]

Exactly ! Thanks

[@toly75]

@thequantifiedscientist thank you. Are you planning a scientific test for mi band 9, regarding its monitoring quality?

[@貓喵-p7i]

Thanks for the Test. Retailers in my area are offering discounts. How are Venu 3 and Vivoactive 5 measuring and monitoring results different or almost identical? After all, prices vary widely. I need advice. 😊

[@TauBuuVuong]

What about step counting test? 😭

[@kinzokushirogane1594]

Did you regularly clean the sensors when doing outdoor cycling tests? Theres always a layer of sweat and crud that builds up on the sensor, and it makes or breaks it.

[@Bomandel94]

This has to be the best Test of a product I've ever seen. Went straight to the subscribe Button. Please keep up this great work!

[@darkregnet3505]

and what about mi band 8 pro? is that the same?

[@benjtheo414]

I would be interested in the Mi band 9, very cool video though!

[@GiuseppeSavo]

I'm waiting for the video on the new Amazfit Balance. It seems quite better respect to other amazfit devices in HR monitoring and in gps precision.

[@TheJeep3000]

I love Amazfit devices, too bad it's a typical Chinese budget brand with a focus on marketing and hardware specs and not on content. Their firmware and algorithm is just underdeveloped in the beginning of each product launch. That said, they do update firmware. I wonder if a new test on recent firmware will show better results.

[@GiuseppeSavo]

@@TheJeep3000 I think so. But onestly it seems that amazfit started supporting more recent devices better than in the past.

[@fablanta]

How come you don't calibrate watches/bands for steps (distance) walked?

[@naqib4235]

So better to get Mi Band 7 instead?

[@yksmadur4678]

I bought Mi band 8 but these videos confused me. What can you recommend in this price range? (I may increase the price a little more.) Pls

[@88FunnyMan88]

Buy used huawei watch gt2 pro this should fit into your price range, or save more money and buy gt3, those watches are most accurate for the price and has amazing battery life

[@samuelneubourg8584]

Are you planning on reviewing the band 9?

[@393Dima]

when does the test of the mi band 9 come out??

[@BetterHumanz]

How to connect to google fit?

[@alejandroschab386]

Hi Rob could you do a review of the Amazfit Band 7 or Amazfit BIP 5? Thanks

[@samiboy1368]

Unbiased review, thank you

[@Canasket]

Actually heard this is pretty accurate for the most part. I have ghe band 6. Tempted to get the 8 but I'll hold of for the Mi band 9 and see if an extra jump can sway me.

[@furkancevik2107]

I'm here because recently I was doing weight exercises, and when I finished the set, my heart was pounding like crazy, but my Mi Band was telling me my heart rate was 88. Clearly, as seen in this video, I need to replace this device. Thank you very much.

[@agfeergaming]

How about the mi band 8 pro with gps? Please make a review. Thank you

[@393Dima]

when does the test of the mi band 9 come out??

[@lecturadelad-laz5174]

Honestly i think for it's size it does things really well compared to bigger smart watches like the apple one or the google one

[@jessontann521]

Waiting for the garmin venu 3 plsssss

[@rookie3279]

Most people buy it for step counts, running/jogging . Would appreciate findings on this .

[@kingjasko]

what budget smartwatch (sub 50€ lets say) would u then recommend?

[@mariodr1067]

please do miband 9 review

[@manijehamakchi]

Can you get the mi band 8 pro

[@ManuelSalcedo]

This is the one I’m waiting for, as it has “dual channel” heart rate

[@gammelgemse]

Its not yet available in Europe.

[@cs8425]

This is exactly what I was looking for

[@jumbocube]

would you think a third party elastic band for the mi band 8 would improve the acuracy?

[@ojuliovieira]

Thank you for doing this so quickly.

[@souphuhn]

Waiting for Venu 3 test! Thanks

[@fxke.126]

So what is the best watch at low price ?

[@VilsonTalks]

How is it at tracking steps? I mostly wanna get a band to track daily steps at work since I don't wanna carry my phone on me

[@hqiu6828]

Sleep tracking is very important to me. I have the mi band 8 and I think the sleep tracking data of mi band 8 generally match the sleep quality I had.

[@TheJeep3000]

But how do you know?

[@astralfields1696]

Wait what? The MiBand6 is actually better for sleep tracking? .. So I don't have to upgrade to the 8 then.. thanks.

[@siiddrb]

Hey Rob! Excellent review as always! Super in depth without boring the watcher! Could you please test the Ultrahuman Ring Air next?

[@glin930]

Do you have any video showing which budget watches has an accurate steps tracking?

[@jayshukla4926]

Can you please do a general fitness accuracy test for steps, calories, running etc? Thanks

[@AlfdRhukvkov]

Can u teste Ticwatch 5 pro and Huawei watch fita SE?

[@Daniel-dj7fh]

is there a heartrate/temperature tracker which syncs with google fit or samsung health?

[@joshuagaughan2902]

How are you able to get the data from the very first plot? I’m a stats major and it would be really cool if I could do analysis of my own from my own device(s). Thanks!

[@KifKroker]

i'm wondering how much is software, hardware or battery optimization impacting these values.

[@kwakithailand]

My 👍 as well as comment are well deserved for your restless work, brother 💪

[@GradualReportSerbia]

Amazing work!

[@TheJeep3000]

The thing with these Chinese branded devices is that in the beginning, at launch, the firmware is always pretty bad. The marketing has a focus on hardware specifications and low price. So development and testing on the algorithm is always lagging behind the launch-schedule. They do improve over time through firmware updates though. Especially with Amazfit, their devices have good hardware but software laks in the beginning. I think that now, after a long time, the results are better than what they were. Not Apple-results, not ever of course, but better than they were at the beginning. I hope they can ever be re-tested. The GTR/GTS 4-series is beautiful and they have such great hardware, hopefully these can be re-tested to see if they improved. Because I think they did.

[@FrankvanCaspel]

Interesting! I'd be interested in a re-test of this device with newer firmware, if only a limited test.

[@realms4219]

Since heartrate is pretty good, is sleep tracking a software issue or hardware? What if we used a different tracker like Sleep as android?

[@condenser]

Where can we find the data, or at least the final ranking graphs?

[@kellymichelley]

Hi, I just want to say I'd love to see a review by you of the Ultrahuman Ring Air. Personally, I'm mostly interested in learning about the details and accuracy of the sleep-tracking function.

[@netscrooge]

Will you be reviewing Oura ring with the Apollo Neuro device?

[@anthonycraig274]

You need to start testing these devices in water, water sports, water activity. You should start this at 2024.

[@gammelgemse]

They are barely accurate in the dry.

[@anthonycraig274]

@@gammelgemse what do you mean? This specific brand model? I am talking about a new data set.

[@gammelgemse]

@@anthonycraig274 yeah, this model and most of the others he tested arent particularly accurate at dry activities like running, cycling, weight lifting. Adding water activities only makes it worse.

[@olaoxxaupomme2409]

Thank you soo much for your video! Its really well made and so useful. I'm looking to buy a smart watch and sleep stracker is really important to me. I'd like to have a watch that cost less than 50€ and that has the best sleep tracker for the price. What would you recommend ?

[@quinnchau7166]

Will you review Scanwatch 2 anytime soon?

[@anydugen]

Can you please do a monthly top 3 or top 5 watch/band/ring list? We all trust your evaluations, and we luv ya, but a summary which might be updated quarterly, would be spectacular. You are the best in this space, just please update ranking your evaluations a bit more current (my explanation is convoluted, but I think you understand).

[@p.a.2712]

Do the mi band 9 sir. Ty

[@timeTegus]

Are you going to test the new Polar Vantage V3 from Polar? Maybe this smartwatch is good enough in sleep tracking and does not stalk me like the Fitbit/Google watches. I don't like it when I need the internet for data syncing or a Google account or a subscription.

[@efandras666]

Please review Mi Band 8 Pro accuacy test 🙏😁

[@annaboyechko]

Will you do Whittings Scanwatch 2?

[@ApacheSenzala]

Will you test the Casio dwh5600 and ghb-2000

[@_icscata_]

Will there ever be a Redmi Watch 4 review? 🥺

[@ajih-ui1if]

After a couple of months, mine was unable to charge. Mi service centre replaced it and again was unable to charge. I have to discard it.

[@zen8]

Will you review the s3 soon?

[@Noorrqr]

Do for mi band 9

[@Noobieliciouz]

would this watch/band could be considered the best bang for buck as of right now or what other smartwatches/fitness bands would and could you recomment which would be the best bang for buck considering those on a tighter budget?

[@reinierpruszner4961]

When do you launch the review of the Garmin venu 3!?

[@TheQuantifiedScientist]

Editing the video right now 😊

[@reinierpruszner4961]

Hoi, vraagje, ik heb de Garmin venu 3 gekocht, super happy, maar kan ik hem ook omhouden met boxen, of zullen de trillingen een negatief effect hebben? De FR265 heeft een boks optie, de venu 3 niet. Let me.know!

[@patrykK1028]

Very impressive. Also was that Vienna in the cycling segment?

[@dimakonstanta1868]

Big thanks for the video!

[@BruceWayne-fs8ty]

If they just give an amazing heart rate monitor + steps counter + Oxygenated Level + ECG but they're as good as the Apple Watch's then I'd be happy. I don't need other fancy stuff.

[@Abd121]

GT3 pro would be the closest fit to those criteria, but it's a lot more expensive than 40$

[@MrBl0wfish]

Yeah well... that is the hard stuff. The other fancy stuff is there BECAUSE an accurate tracker would be way more expensive to produce.

[@gammelgemse]

Trickle down tech is a thing. Sooner or later we will get there.

[@fullofmysteries]

Waiting for Garmin Venu 3 and Vivoactive 5 🤞

[@archimedes09ify]

Please review the mi band 9.🎉

[@artgeepyz9119]

Hey Rob!! Can u test TicWatch 5 pro and Huawei watch fit SE??? 🎉❤

[@10xman9]

It would be nice to see how it would perform during running, as most people don't tend to clench their hand during runner but rather pretty relaxed hands. Would that give more accurate reading similar to stationery cycling? Thanks again for the wonderful scientific approach.

[@rogerdelbarco]

Amazing. You’ve put a lot of effort in this video, congrats. Maybe you could add “running” in outdoors activities, it’s something a lot of people are interested. Cheers 😊