Fitbit Charge 6 : Long-term Scientific Review (2024)

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Күн бұрын

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Timestamps:
00:00 Quick Intro
00:53 Heart Rate Test 1 : Indoor Cycling
05:41 Heart Rate Test 2 : Running
08:25 Heart Rate Test 3 : Outdoor Cycling
11:25 Heart Rate Test 4 : Weight Lifting
14:21 Sleep Test
18:27 Sleep Test : Independent Second Test
20:06 Sleep Test : Comparison w/ Other Watches
22:31 GPS Test
25:27 Recommendations & Conclusions
The Fitbit Charge 6 has improved a lot over the Charge 5, at least in some regards, and this mostly seems to have been achieved using software and not hardware improvements. In this video we will be systematically testing the health and sports tracking of the Fitbit Charge 6 to see what its strengths and weaknesses are, to help you decide if the Charge 6 is the right watch for you. Specifically, we will be testing the heart rate tracking performance, comparing the sleep stage tracking to an EEG reference and looking at the consistency of the GPS tracking. Let’s dive in!
The Fitbit Charge 6 looks more-or-less identical to the Charge 5, however, it does seem to have substantially improved. And, as far as I can tell, this is not because of any major change of the internals of this watch, but it seems to be because of better software. By the way, for those of you that are new to the channel, my name is Rob, and I am a postdoctoral scientist specializing in biological data analysis. So let’s get right to those results, and I want to start off by testing the heart rate tracking performance of the Charge 6 during exercise.
OK, what are my conclusions? Well, if you want pretty good heart rate and sleep stage tracking at a reasonable price, the Fitbit Charge 6 is actually a really good choice. I am impressed with what the folks at Google were able to do, with what I think were mostly software improvements. Only the GPS tracking was really disappointing. Not taking into account the GPS tracking, I would give the Charge 6, 4 out of 5 stars. However, given the poor GPS tracking we would have to deduct at least half a star. However, if you do not care about GPS tracking, it is a very solid choice, and given that you can get it on Amazon for around 140 dollars, that’s not bad at all. The main downside of Fitbit Devices in my experience is that they tend to break quite often. Back in the day, a friend of mine went through about 3 to 4 broken Fitbit Ionics, before Fitbit would no longer send replacements. But at the moment both my Charge 6’s are still working, so maybe Fitbit solved that issue.

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@TheQuantifiedScientist 2 ай бұрын

🔴 Best place to get a Fitbit Charge 6* ;-) : geni.us/Charge6 🔴 General Amazon link*: geni.us/thequantifiedscientist 🟢 Instagram: instagram.com/quantified_scientist/ 🟠 Shorts: studio.kzfaq.info/love/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. 🟢Check out Max’s Blog: blog.kto.to/accuracy-fitbit-charge-6-vs-home-psg-eeg-sleep-lab ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 👇 $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 DEVICES▬▬▬▬▬▬▬▬▬▬ 🔴 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 🔴 General Amazon link*: geni.us/thequantifiedscientist

@Aditya-cd2lv 2 ай бұрын

Please review Samsung Galaxy Fit 3 newly launched.

@NostalgicMem0ries 2 ай бұрын

cant wait for this too, wonder if squared form will help hr sensor like it helps apple devices

@aaronmoravek 2 ай бұрын

He's going to need to go onto the deep dark web to find it. Like eBay.

@aaakmm1785 2 ай бұрын

@@aaronmoravekWhy? He lives in Europe so he can buy it in every electronics store.

@30mattdavies 2 ай бұрын

Pointless! It’s a shatsung. All wearables from Samsung are crap! Great phones, crap watches

@aaakmm1785 2 ай бұрын

@@30mattdaviesMaybe but if confirmed people will no longer wonder.

@milzar 2 ай бұрын

Great video Rob! When are you planning to review the Ultrahuman Air?

@RohitSurw 2 ай бұрын

Please review Samsung Galaxy Fit 3.

@danieljrgensen133 2 ай бұрын

Rob, the Dreem headband device is still being sold(and even upgraded to Dreem 3), so you should probably look into this. They only stopped selling it for private users(but still offers customer support for owners of the Dreem 2). Since you use it in a professional setting(KZfaq business), you might even be able to purchase their latest and greatest headband! 😉 BTW. Your original Fitbit Charge 5 review reports much better percentage accuracy numbers for the sleepstage tracking....perhaps you should address this? 🤔😉

@TheQuantifiedScientist 2 ай бұрын

Hi! I retested some things or add more nights of data, so percentages might change to be up to date or more complete. Unfortunately that is the best I can do at this stage. I was in contact with Dreem/Beacon, and they would charge me tens of thousands of euros per year, which I cannot afford😅

@TheQuantifiedScientist 2 ай бұрын

I have 3 Dreem 2 bands, but there is no support and no replies from the team at Dreem/Beacon any more

@danieljrgensen133 2 ай бұрын

@@TheQuantifiedScientist hello again Rob. Try and do a search on Google on the following article title "Has Dreem invented the ultimate sleep wearable".

@miket3652 2 ай бұрын

Great review Rob. How do you pull the HR values from the wearables to plot on your graphs? Just wondering how to get the data from the Fitbit devices. Thanks!!

@pauljones9150 2 ай бұрын

Love your quality of the work

@TheQuantifiedScientist 2 ай бұрын

Thanks so much!😊

@ronan1536 2 ай бұрын

Nice video like always, I got a charge 6 for Christmas. About the GPS accuracy the few times I used it it was okay (worse than a phone but not all over the place like in the video) but I was using it in an open environment. I think the signals are not powerful so in a city with many buildings it really struggle.

@SoloCristian 2 ай бұрын

Hi Rob, I've been following your channel for a short while and I really like your content. Really compliments. Can I ask you for advice? In your opinion, what is the most reliable and accurate smartwatch for health and fitness other than Apple?

@mboiko 2 ай бұрын

Great video Rob. Android users in the US can throw out Apple and Huawei products. Once you do that, your quality smartwatch/fitness band choices are much more limited. In light of that, the Fitbit Charge 6 definitely offers a great "bang for the buck"...not to mention the possibility of a 1-week battery life.

@mari.be.86 2 ай бұрын

I can confirm the battery life of 1 week. That's something no one else has. Yes, 7 days on 1 charge, Apple watch lasts a maximum of 36 hours.

@TheQuantifiedScientist 2 ай бұрын

Thanks for sharing!😊

@yngvenordahl262 2 ай бұрын

@@mari.be.86Garmin has watches that last for weeks, and some times even months. They have good sleep stage tracking as well, with the exception of the REM stage.

@user-spartium 2 ай бұрын

Thanks for the video! These quantified reviews should be the most important aspect for choosing wearables, but these are hard to see anywhere else.

@emmanuelmayr5895 2 ай бұрын

Could you please also review the new Galaxy Fit3 and OnePlus Watch2

@Predi1105 2 ай бұрын

@TheQuantifiedScientist 2 ай бұрын

Thanks for the suggestions! Just ordered a Fit3😊

@bblackbadgerr 2 ай бұрын

What about the OnePlus Watch 2?@@TheQuantifiedScientist

@XofWandsMusic 2 ай бұрын

Lots of great data, thank you. Was basic step tracking accuracy addressed in your tests? I’ve heard fitbits often overcount

@BigBampot 2 ай бұрын

Hi Rob. I have hand issues so stopped wearing my Galaxy Watch 5 Pro. As the Charge 6 is smaller, I want to try it. Im only walking, outdoor cycling and interested in Sleep Tracking. Is the Charge 6 generally the same or better for this?

@katherineslattery2 2 ай бұрын

Great video! Thanks for making this :)

@manuelalongonidecastro4043 2 ай бұрын

durability of fitbit is a challenge. It doesn't last 2 years. Love it, but it sucks because of that.

@felipemachado6918 2 ай бұрын

Absolutely brilliant. Thank you for the review. I’m curious as to why HRV hasn’t been reviewed, given that it’s one of the simplest and *most important* biometrics to measure.

@MrMorton 2 ай бұрын

I'm glad you refreshed your Charge 6 testing. I have the PW1 now but I decided I really love good health metrics but don't care about a "smart watch." Think I'll just get a good Fitbit band next time (if they keep making them.)

@Predi1105 2 ай бұрын

Galaxy Fit3 please! We are very courius whats new about sensors quality.

@SOz.61 2 ай бұрын

What do you think about fitness trackers without displays? I'm thinking about a device without a screen and accurate heart rate measuring etc and long battery life. Is there any product like this available which is even cheaper than fitness bands? Or is the Huawei band 8 the best option in this market?

@dnserror89 2 ай бұрын

Bedankt voor de review

@BazFilmz Ай бұрын

Many thanks You've convinced me to get one Appreciate your work 🙏🏽🙏🏽🙏🏽

@jamescampolo7824 2 ай бұрын

I always use my phone's GPS along side my Charge 5 mainly to save battery on the Charge but the accuracy of the Samsung S23 is excellent. I have a Charge 6 on the way and I'll keep it paired with my phone for GPS.

@TheContrariann 2 ай бұрын

*Sir, When is the Samsung Galaxy Fit 3 deep evaluation and comparison coming ?*

@sharminatiq 2 ай бұрын

I really enjoy your video. Waiting to see reviews of- 1. One Plus watch 2 2. Xiaomi watch 2 pro

@jeremylehner8652 Ай бұрын

Purchssed in Feb this year. Charge 6 is now dead as a door nail. If you are in Australia google doesnt provide warranty as they dont recognise this product and fitbit doesnt do a warranty as they say its a google product. Ive given up never trust google.

@fabriciooliveira3720 17 күн бұрын

A renewed apple watch SE is about the same price as a new Fitbit Charge 6 Which one should i buy? I use android BTW, i dont have iphone so ill lose some of the apple watch features.

@dirtibertfirst 2 ай бұрын

What an amazing review. Rarely have I had such confidence in a buying choice, backed up by hard data. Thank you. 😃

@Whatreally123 22 күн бұрын

I am planning to buy a Polar H10. Do the 2 Polar apps (Flow and Beat) have the feature where I can set custom heart rates (low and high threshold) and if I cross them, it will notify me via a beep or vibration?

@still_skeptical 21 күн бұрын

How tall are the buildings on your ride to work? I saw another comment about tracking through buildings. In my experience land surveying, even Trimble base station GPS surveys struggle around tall buildings or trees, and take quite some time to connect to satellites depending on the timing with regard to orbits and clear sky exposure.

@carldunne3866 2 ай бұрын

Would love to see a review of the ultra human ring v Oura ring gen 3 as the ultra human has NO monthly subscription

@MasterChief-119 2 ай бұрын

Please make a video for samsung fit 3. I have learned a lot from your videos and I am glad that I have found your channel. I really wanna know more about Fit 3 because i am thinking of buying it and I wanna know if it is better than huawei band 8 in heart rate monitoring and sleep cycles.

@abhishekthorat1280 2 ай бұрын

Great video!!! Could you please please review the galaxy fit 3, checking your channel daily for it😭

@HM-hu4hu 2 ай бұрын

Does it overcount steps by up to 30-40% like some other Fitbits?

@jk8559 2 ай бұрын

As always, a great review. I think that the GPS issue is not that dramatic, you can set it to dynamic mode and use the GPS from a smartphone. That's what I always do, and I have no problems at all with the tracking. I understand that some people do not want to take their phones with them, but i carry mine always with me

@VishalSingh-jl7oy 2 ай бұрын

Please review OnePlus watch 2.. need to buy but will take decisions as per your analysis & recommendations. Please do that video

@Lxncee0 2 ай бұрын

Hello can you please review the galaxy fit 3? i've gotten one yesterday and i wanna see if its accurate and worth it

@jacobstaff549 2 ай бұрын

Great content very enjoyable...i give one idea...what about do compare PNOE device and watches how accurate they burn calories...❤

@zhengyang6693 2 ай бұрын

Any chance you could do a review on the oneplus watch 2 that was released recently?

@ernestoponce9894 2 ай бұрын

how do you get all the RAW data from the device ? I tried exporting the data from Google Takeout but it doesnt have all the info to do some of the graphs you show in your videos.

@ozzicarman Ай бұрын

what is the correlation for the spinning without the outlier session that had a lot of noise?

@roykfrost1579 Ай бұрын

Great review, would be great to test VO2 MAX on this and another similar devices. In Charge 6 is named cardio fitness score.

@mrigangagrawal5821 2 ай бұрын

Appreciate your efforts 🎉 Ps- please we need a video on one plus watch 🙏🙏

@Ataraxia_Atom 2 ай бұрын

Glad the new one came out, i just picked up my first health tracker fitbit charge 5 for $40

@raphaelpommier4304 Ай бұрын

Awesome Rob!

@RajputSaahil Ай бұрын

i already have garmin instinct , apple watch SE, galaxy watch 4,... i want a new one now which will be good in HR dept. as i do weight training and run occasionally ... what would you suggest in under 500dollars

@LVArturs 2 ай бұрын

Is there a way to export the sleep cycle data to a file or 3rd party app without paying for the subscription?

@abdulrahmanf809 Күн бұрын

Hello, for agreement evaluation, it's better to use a Bland-Altman plot rather than a scatter plot.

@yildiraykomurcu 2 ай бұрын

We wish to see Ultrahuman ring review.

@mikeLewisville 2 ай бұрын

I would like to see a test of the OnePlus Watch 2. I almost always use polar h10 during training but want a device that is good for sleep and activity tracking overall

@vc9105 Ай бұрын

I own a charge 6. I found that wearing the band higher up my arm while doing exercises where my arms are swinging gives me better readings. Unfortunately after 6 months mine just became a brick. I should be getting a replacement under warranty soon hopefully.

@ricoagustinus1576 2 ай бұрын

Rob could you review the new software update from Galaxy Watch 6 series? Some people said it more accurate. Thanks in advance

@BigBampot 2 ай бұрын

Have you tried the Amazfit Zen Buds?

@rohitdhilon 2 ай бұрын

@TheQuantifiedScientist kindly review oneplus watch 2. As per your reviews pixel watch 2 is best yet. Want to know if oneplus holds up

@theoimmikhuizen350 Ай бұрын

I am curios how accurate the fitbit charge 6 is when you wear it for only tracking heart and sleep and walking .. so not for excercise

@CashMoneyMoore 2 ай бұрын

Thanks for the review! Watches I'd love to see reviewed: redmi watch 4 & oneplus watch 2 - cheers!

@berserkkw 2 ай бұрын

Has the step counter improved on this?

@Martin_Ptacek Ай бұрын

Is charge 6 good for pool swimming?

@kunalsharma2098 2 ай бұрын

Please do a review for the new OnePlus watch 2 and the latest nothing watch.

@jakubstepien5645 2 ай бұрын

Phew, it's relieving to hear a positive review a week after I bought it 😉

@shmvon 2 ай бұрын

The Fitbit Charge watches are really good and the battery lasts long (if you don't do long GPS tracking), but Google has messed up the data export functionality, so you can't take your data with you when eventually it breaks.

@macmu1 2 ай бұрын

I love the scientific approach!!!

@Hitesh_Dahiya 2 ай бұрын

Love your deep scientific analysis.❤ Which one would you recommend Galaxy Watch 4 or Amazfit GTS 4?? For health monitoring accuracy. Specially during strength training.

@simdencard 2 ай бұрын

Samsung Watch for better heart rate tracking

@Hitesh_Dahiya 2 ай бұрын

@@simdencard all Samsung watches from 4-6 have same sensors in them right? Apart from processor changes.. the one responsible for heart rate tracking spo2 etc are similar right?

@simdencard 2 ай бұрын

@@Hitesh_Dahiya They can all do what you have mentioned. Correct.

@Aman...Gr8. 2 ай бұрын

Please do a detailed review of Galaxy Fit 3

@trex6142 Ай бұрын

On outside runs the band has to be rather tight or sunlight ruins the pulse measurement. My last run was spot on. The gps on the six tends to drop signal and isn't as accurate as the versa 3

@TheContrariann 2 ай бұрын

*Sir, When is the Samsung GALAXY FIT 3 deep evaluation and comparison with **_GALAXY WATCH 6_** CLASSIC coming ?*

@Animelove333 2 ай бұрын

If you don't mind could you add you know brisk walking / power walking or could you at least tell me what would that be equivalent to cuz I bought the watch for that and I also do HIIT training like jumping jacks so these are the situations I use it for so I would love it if you add these or at least give a equivalent like can I use cycling data as like walking data or like at least something. And as for the watch I bought it's not this it's the Huawei band 8 you recommended it for being quite accurate and I really didn't want to spend a lot of money on a watch which I would use for maybe one to two hours I don't track my sleep I don't even wear it all day long I just wear it when I'm exercising

@akorejepade1261 2 ай бұрын

Hope you get to test the new Galaxy Fit 3! I compared the SP02 on it with my always low Galaxy Watch 5 and it looks like they fixed the SP02 on Fit3!

@shoop9274 Ай бұрын

consistenty all devices tend to have better result when comparted to a more sufisticated sleep tracker especially the apple watch... dont you think that the zemax EEG device is not not a good enough baseline to do these tests?

@AMARFPV 2 ай бұрын

Hoi Rob, geweldige content. Zou je de Ultrahuman Ring Air eens kunnen testen? Hoe verhoudt deze zich tot de Oura Ring 3 ? De Ultrahuman vereist geen subscriptie, wat een groot voordeel is in mijn ogen.

@dwikisanjaya9737 2 ай бұрын

Please review coospo h808s, its under 50$, and people says the accuracy simmiliar with polar h10

@StivenAgoubi 2 ай бұрын

You should make a video comparing software on the smartphones, which has the best health tracking metrics? Same with their respective mobile apps. What about price? Which gives best bang for your buck?

@felixt1470 Ай бұрын

I have several Fitbit charge devices over the years and yes, after 2-3 years the screen went blank. Fitbit always give you 25-35% off another device but that’s no excuse for not making their products durable.

@lucasinacio1484 2 ай бұрын

Please, review the redmi watch 4 and the oneplus watch 2.

@mike_litoris. 2 ай бұрын

Kindly do a review on newly launched Samsung Galaxy Fit 3

@TheQuantifiedScientist 2 ай бұрын

Yes! Should get one tomorrow 😌

@cadlefamily 2 ай бұрын

Can we have a review of the scan watch nova pls

@g00nther 2 ай бұрын

I haven't upgraded to the Charge 6 because they took out the altimeter. What's the best tracker with an altimeter?

@george6252 2 ай бұрын

Not surprising, Google is watering down Fitbit. Sense 2 and Versa 4 for example have less software than their predecessors. I suspect Fitbit is doomed. This time next year I may be trashing my Fitbits. 😪

@Pohmetolog 2 ай бұрын

Whats the point in altimeter? Barometric pressure changes make you gain stairs without having to actually being on stairs

@yatindrasingh6359 2 ай бұрын

One Plus Watch 2 review please!!

@TheAalord 2 ай бұрын

Please, review xiaomi s3 the new one.

@lxMaDnEsSxl Ай бұрын

Sleep most important function, to track, for me, charge 6 looked good in all the graphs [heart rate] except it didn't out-perform and under-performed the inspire 3 and inspire 2, for sleep tracking. Also, if inspire 4 has better HR tracking across sports (like charge6), with it's 1+ week battery, may be good upgrade from inspire 2. Odd inspire 2 still has best sleep tracking on the x-axis from Google/Fitbit. With Inspire3 just marginally behind on xaxis but more consistent on it's worst sleep stage tracking on y-Axis....

@GlitterGuru 2 ай бұрын

I wonder if there’s a way to flash charge 6 software to a charge 5 🤔

@mq6tz4pl2d 2 ай бұрын

I have found the Charge 6 to be accurate for walks but quite poor for indoor rowing compared to my Polar H10.

@zerteruz 2 ай бұрын

This was a real and 5 stars review!

@stargazer3609 2 ай бұрын

Could you please test Honor Choice Watch as well

@aaakmm1785 2 ай бұрын

In this video on youtube "Samsung Galaxy Fit 3: Warum du dir das Geld sparen kannst" there are accuracy measurements of HR. They are really bad. So don't hope for good results on this channel.

@Izya001 2 ай бұрын

Dear Rob! Have you done any analysis of HRV? Does it have any value or it is a gimmick? What is the best device to track/measure HRV? What is the best application? The values and results differ - Welltory may show low HRV (they have HRV Index and HRV) while Elite HRV may show a perfect balance between sympathetic and parasympathetic nervous systems. Can you please provide your view and, possible analysis? Thank you so much.

@quantifiedmax 2 ай бұрын

>Elite HRV may show a perfect balance between sympathetic and parasympathetic nervous systems It cant, because HRV reflects parasympathetic system and you can't extract sympathetic or their balance. If you will look at novel research the old hypothetis that LF and LF/HF represent sympathetic system or their pns/sns balance is not supported by data. What you see is based mostly on a parasympathetic system.

@Oceangirl1234 2 ай бұрын

Great review the u

@Jaburu 29 күн бұрын

what about the Luxe?

@iceman4691 2 ай бұрын

Please review gshock G-Squad 5600 smartwatch

@alwinsebastian7499 2 ай бұрын

waiting for Galaxy Fit 3 review. please compare it with CMF watch.

@MuslimZrAbdellatif 2 ай бұрын

Please review for oneplus watch 2

@kolapsus 2 ай бұрын

Please review redmi watch 4

@ggfmua 2 ай бұрын

For me, it is unexpected how close Charge 6 is to Pixel Watch 2. Maybe, if it did have more features available compared to the Pixel Watch 2 - I'd choose it over the Google Watch device

@dimaspanjiandalantama 2 ай бұрын

please review garmin forerunner 165 series

@grecuccionicola 2 ай бұрын

I have the charge 6 , this morning I dit a walk on the treadmill, and my heartrate was 95/110 , the last 5 min , I dit very slow walking, normal the heartrate must go low , what it also dit , but then sudden it as around the 140 , and after a couple of seconds it was in the 80 , strange , it’s not the first time that it does like that .

@blange1808 2 ай бұрын

I observed regularly these unexplainable peaks in the measured heartrate during normal walking too. These peaks occurred in two charge 6 I bought. I returned both.

@jayasuriyas2604 2 ай бұрын

Please review galaxy fit 3

@JulianAndresKlode 2 ай бұрын

How do you get good data out of a Polar H10 for outdoor cycling? I need to soak it in hot water, rub water all over the chest, as otherwise it will be dead and report stupid shit like 70 bpm or 90 bpm when doing 130 bpm. Maybe I need to replace my strap but it works like 80% of the time. Luckily I have power meter pedals so I don't really need HR much for training stress tracking.

@JulianAndresKlode 2 ай бұрын

I also have ECG contact gel but I don't find it more constructive, it works short term but will dissipate over time as the body dries everything back out again.

@FOREST-9351 2 ай бұрын

Please please make video on accuracy test of oneplus watch 2

@henrikdahlberg878 8 күн бұрын

The algorithms realised I am looking at the Fitbit Charge 6 and presented me with an article about the "rumoured" fitbit charge 7 with speculated release in September. Worth waiting for?

@t49i 2 ай бұрын

review redmi watch 4 please

@sudhandhanasekaran9891 2 ай бұрын

Hi.. Your reviews are extremely awesome. Especially, I was amazed by your in depth scientific analysis. CAN PLEASE CHECK/REVIEW/ANALYSE THE ULTRAHUMAN RING AIR?? I am eagerly waiting for you to review that for very long time.