Apple Watch Series 9 : Full SCIENTIFIC Review

🟡 Twitter: @QuantifiedRob
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Reference devices:

Intro Music:
Music from #Uppbeat (free for Creators!):
License code: OBLD6VBBCTRDFZQP

Timestamps:
00:00 Quick Intro
00:57 Testing setup
01:24 Apple Watch 9 Improvements
04:05 Indoor Cycling Test 1 : Male
06:54 Indoor Cycling Test 2 : Female
08:05 Indoor Cycling Test : Comparison w/ Other Watches
09:38 Outdoor Cycling Test 1 : Male
12:03 Outdoor Cycling Test 2 : Female
13:06 Outdoor Cycling Test : Comparison w/ Other Watches
14:29 Running Test 1 : Male
15:51 Running Test 2 : Female
16:36 Weight Lifting Test 1 : Male
18:46 Weight Lifting Test 2 : Female
19:43 Weight Lifting Test : Comparison w/ Other Watches
21:44 Sleep Test : Series 9
29:40 Sleep Test : Comparison w/ Other Watches
33:25 GPS Test
38:31 Oxygen Saturation Test
41:11 Limitations
42:00 Recommendations & Conclusions

For the most part, the watch is very similar to the Series 8, but with a few improvements: first of all, the screen is quite a bit brighter, which is quite nice actually. It is quite tricky to capture on camera, but here you can see it for yourself under a bunch of different circumstances. Second, one of the main things that was addressed in the keynote is that it has a new and much more powerful S9 chip, which among other things enables the “double tap”. This was one of the most highlighted features during the keynote, maybe a bit too much in my opinion, but it is quite cool. This is available starting from watchOS version 10.1, which unfortunately isn’t out yet, and Apple did not invite me to the launch event or give me early access, so I couldn’ test it. Hey Apple, hint, hint… Now, online I saw many comments that Apple Watches basically had this feature for a long time, called Assistive Touch. I tried Assistive Touch on my Apple Watch Series 8 before the Series 9 was released, and it does have much of the same functionalities as Double Tap. Though I did find it kind of clunky to use. DC Rainmaker mentioned in his video that the double tap feature worked significantly better for him than Assistive touch. Now, Apple says the double tap feature will only work on the Series 9, because it needs the S9 chip, which is probably true for the way it is implemented. However, I still wonder if they couldn’t have made it work on older series if they’d really wanted to, but OK, it is Apple we are talking about. Now, the new S9 chip also enables Siri to do some new things: first of all, Siri can now process some commands on-device, meaning it is much faster at doing certain things, like setting an alarm. This is honestly much more important to me than double tap, since I will use Siri much more for these kinds of small tasks now. Siri can now also access your health and fitness data, and also add health data via voice commands, or at least, you will be able to do so “later this year”.

[TheQuantifiedScientist]

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🟡 Twitter: @QuantifiedRob
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[hxl]

Thanks for the rigorous evaluation!
I think it’s important that there are public scientific evaluations like this because they incentivize companies to pay more attention to the accuracy of their measurements.

[xMoondo]

Rob, your videos are always so informative and helpful. I go to your channel for any tech wear because I know your testing and explanations will be above all the rest. Thanks man.

[Pohmetolog]

Can we please see Venu 3 sleep test review? And a small tip, thank you for your work!

[henzoarruda]

Have you considered the possibility of also testing the accuracy of bioimpedance or electrocardiogram on watches that have this function? It would be important to know whether the results are really consistent.

[leogallagher]

excellent as always, Rob! thanks for taking the time to do this. I suffer with panic attacks and sometimes it leads to my heart racing, so it's great to know that I can have an accurate reading on my wrist, it puts my mind at ease. Thanks again!

[ncls]

Thank you very much for this review. Keep up the effort. You are serving us incredibly qualitative videos!

[ryankassel]

Great video, really enjoying how the channel has developed and the improvements you have made. It was cool seeing a bit of your code!

[Dabby]

This was unbelievably informative! are you by any chance going to be testing Garmin Venu 3? I've heard good things from other watch reviewers but of course no one does such extensive testing like you do. So i'm interested in the data you gather from the the Garmin Venu 3

[mboiko]

Rob, please put the Garmin Vivoactive 5 and Venu 3 on your list...these offer the best combination of Heart/Sleep/GPS accuracy along with great battery life and affordability...for the Android user.

[johnnyzxc]

I’m wondering if the upgrade for the health data is from the software or the hardware. It might be interesting to test those generations with latest watchOS😊

[manuumanath]

Never miss any of your Videos. Loads of Relevant information.I have an Apple Watch SE2, got it based on your review.Really hope we have more reviewers like you, rather than ones reading out of Spec sheets.Cheers

[giridhranpalani]

Love the comprehensive review Rob! I hate that the Apple Watch is leagues beyond the Samsung Galaxy watch and other android watches as I am a Galaxy user.

I really hope these videos are taken seriously by android OS watch manufacturers to make sure we get the same quality for the price we pay because its almost on par.

Thanks for keeping us well informed! Much love 😁❤

[ggianne]

Amazfit Balance changed heart rate sensor from previous watches... curious to see if they finally improved !!!

[VRayDantesTrygorn]

Thanks for your amazing work in helping us make informed choices in our times of marketing and consumerism. Hope to see soon some video of your tips on how to use biometrics to improve our lives <3

[EduardoHenrique-ndro]

Another lovely and informative video, Rob! Thanks for sharing!
Cheers from Brazil! 😊

[pablov]

Looking forward to a scanwatch 2 review. Hope it's at least better than the older one 😅

[MauPP]

Please review the Huawei watch D 🙏

It also measures blood pressure 🤯

I know the sleep algorithm is not good in Huawei products due to your videos (thanks BTW), but I wanna see if the accurate heart measurements also apply to this new Watch

[qocks]

As always love your videos and thanks for the effort you put into them, are you planning to review the withings scanwatch 2?

[joaoguedesdealmeida]

great video! when will you be making the review to pixel watch 2? curious for that one