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: https://www.instagram.com/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: https://youtu.be/NYRq4ahPJ2c

Fitbit Charge 4 Heart Rate: https://youtu.be/xAv6dyPd9ns

Fitbit Sense First look review and test: https://youtu.be/w6D_uUDUP2k

Fitbit Sense Heart rate: https://youtu.be/7-u8VTmeDF0

📹Apple watch videos📹

Sleep Cycle App: https://youtu.be/fjPng54_CtE

steps: https://youtu.be/YbstQVHEVz4

Test: https://youtu.be/0Ub7qmZz9ec

📹First Garmin Venu Sq Video📹

https://youtu.be/LiwX2TxYpQo

📹Oura Ring videos📹

Sleep Test: https://youtu.be/atWcp6FmnbE

HRV Test: https://youtu.be/AK47cav1i28

Temperature Test: https://youtu.be/VIfvRzP79Bs

📹Withings Scanwatch videos📹

Unboxing and first review: https://youtu.be/swQLhrdxEkk

Sleep test: https://youtu.be/lWPxpdUjLBI

Heart rate test: https://youtu.be/KjemOE2eHcY

Q&A with Withings: https://youtu.be/KtRh-_9kXgM

⏱️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:

https://youtu.be/8iPWu0Cbq14 ⏱️

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/by/4.0/)

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