Amazfit GTR 3: Scientific Review

I tested the Amazfit GTR 3 against a scientific sleep EEG device, and tested the heart rate, SpO2 and GPS accuracy. Subscribe to my weekly Newsletter(!) on www.robterhorst.com
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Amazfit GTR 3 Firmware used: 7.22.7.1 (latest version available on my iPhone in my region on 2021-11-14)

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Apple Watch 41 mm: https://geni.us/AppleWatch7_41
Apple Watch 45 mm: https://geni.us/AppleWatch7

Amazfit GTR 3: https://geni.us/Amazfit_GTR_3

Fitbit Charge 5: https://geni.us/FitbitCharge5
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

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Light: https://geni.us/Godox_VL150
Softbox: https://geni.us/NiceFotoSoftbox
Light stand: https://geni.us/WalimexLightstand

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

⏱️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
00:46 Results: Heart Rate Test
04:19 Results: Sleep Test
07:43 Results: SpO2 Test
09:05 Results: GPS Test
10:26 Conclusions
10:56 Buy The Amazfit GTR 3?

🎵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.