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 Instagram:   / quantified_scientist   Twitter: @QuantifiedRob 👇Affiliate* (paid) link to join WHOOP, support 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!👇 Fitbit Luxe: https://geni.us/Fitbit_Luxe Fitbit Charge 4: https://geni.us/wjAfjU Fitbit Sense: https://geni.us/CSfYQE8 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 Want to buy the Galaxy Watch 4 despite me not recommending it: https://geni.us/GalaxyWatch4 📸My Gear* (paid link)📸 Camera body (main): https://geni.us/SonyA6600_body Camera lense (main): https://geni.us/sony_sel_18-135 Camera (B-roll): https://geni.us/CanonEosM50MarkII Light: https://geni.us/Godox_VL150 Softbox: https://geni.us/NiceFotoSoftbox Light stand: https://geni.us/WalimexLightstand *My opinions are completely my own. However, I do earn a small commission if you purchase any of these devices via my affiliate 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 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