I tested the Samsung Galaxy Watch 3 against a scientific EEG device, and tested the SpO2, heart rate and step counting accuracy. Subscribe to my weekly Newsletter(!) on www.robterhorst.com
Instagram:   / quantified_scientist  
Twitter: @QuantifiedRob

👇Amazon Affiliate* (paid) links. Supports the channel, doesn't cost you any more!👇
Samsung Galaxy Watch 3: https://geni.us/SamsungWatch3

Apple Watch 40 mm: https://geni.us/0gNGeO
Apple Watch 44 mm: https://geni.us/7Dom

Fitbit Charge 4: https://geni.us/wjAfjU
Fitbit Sense: https://geni.us/CSfYQE8
Fitbit Inspire 2: https://geni.us/iZHlb

Huawei GT2e: https://geni.us/aYVruh
Huawei GT2 Pro Classic: https://geni.us/iCgX
Huawei GT2 Pro Nebula Grey: https://geni.us/yD7ew9V
Huawei GT2: https://geni.us/xpAWsr

*My opinions are completely my own. However, I do earn a small commission if you purchase any of these devices via my affiliate links. It does not cost you any more money if you use these links.

The EEG tracker I used is called the Hypnodyne ZMax: http://hypnodynecorp.com/ from @HypnoDyne Corp

📹Fitbit Videos📹
Fitbit Charge 3/4 Sleep:    • FitBit Charge 4 Ultimate Sleep Test  
Fitbit Charge 4 Heart Rate:    • Fitbit Charge 4 Review: Heart Rate Ac...  
Fitbit Sense First look review and test:    • Fitbit Sense Accuracy (Sleep, Step co...  
Fitbit Sense Heart rate:    • Fitbit Sense Heart Rate Accuracy (Tes...  

📹Apple watch videos📹
Sleep Cycle App:    • Sleep Cycle App Review: Apple Watch S...  
Steps:    • Apple Watch 6 Step Counting Accuracy ...  
Test:    • Apple Watch 6 Accuracy (Sleep, Heart ...  

📹First Garmin Venu Sq Video📹
   • Garmin Venu Sq Heart Rate Accuracy (t...  

📹Oura Ring videos📹
Sleep Test:    • Oura Ring Scientific Sleep Test (Review)  
HRV Test:    • Oura Ring Review: Heart Rate Variabil...  
Temperature Test:    • Oura Ring Ultimate Temperature Test (...  

📹Withings Scanwatch videos📹
Unboxing and first review:    • Withings Scanwatch Review (Heart Rate...  
Sleep test:    • Withings Scanwatch Sleep Test (Review)  
Heart rate test:    • Withings Scanwatch Heart Rate Test (R...  
Q&A with Withings:    • Scanwatch Q&A: Answers from Withings  

⏱️This comparison is part of a larger project where I spend over 11 hours a week tracking everything in my life. If you'd like to know more:
   • This mad scientist scanned his brain ...   ⏱️

Timestamps:
00:00 General intro
00:45 Galaxy Watch 3 Basic Info
02:07 Results: Sleep Test Setup
02:51 Results: Sleep Test Comparison
06:52 Results: Sleep Test Overview
08:55 Results: Heart Rate Test
13:04 Results: Oxygen Saturation (SpO2)
16:51 Results: Step Test
18:19 Conclusions
19:25 Should You Buy It?
20:14 Limitations

🎵Music🎵
(1) Not Without the Rest by Twin Musicom is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/...)
Artist: http://www.twinmusicom.org/
(2) Wonders by JVNA
(3) Can’t Sleep (YouTube Audio Library)
(4) Classique (YouTube Audio Library)
(5) Blurry Vision (YouTube Audio Library)
Person Waking up Video by Ba Tik from Pexels

Many thanks to Rob and Frederik (and his FUN:D SCIENCE FOUNDATION) for their help with the OpenBCI device.