Samsung Galaxy Watch 4: Complete Scientific Review

I tested the Samsung Galaxy Watch 4 against a scientific sleep EEG device, and tested the Blood Pressure, SpO2, Heart Rate and Step Counting accuracy. Subscribe to my weekly Newsletter(!) on www.robterhorst.com
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Fitbit Inspire 2: https://geni.us/iZHlb

Xiaomi Mi Watch: https://geni.us/Xiaomi_Mi_Watch
Xiaomi Mi Watch Lite: https://geni.us/XiaomiMiWatchLite

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

Huawei Band 6: https://geni.us/HuaweiBand6
Honor Band 6: https://geni.us/honorBand6

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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
01:05 Galaxy Watch 4 Basic Info
02:22 Results: Sleep Test Setup
02:59 Results: Sleep Test Comparison
06:53 Results: Sleep Test Overview
08:40 Results: Waking Up/Falling Asleep
09:32 Results: Versus Other Devices
10:00 Results: Heart Rate Test Spinning
12:29 Results: Heart Rate Test Cycling
14:01 Results: Heart Rate Test Longboard
14:29 Results: Heart Rate Test Weights
16:02 Results: Blood Pressure Test
19:36 Results: Oxygen Saturation (SpO2)
21:51 Results: Step Test
22:54 Conclusions
23:37 Buy The Galaxy Watch 4?
24:15 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