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 Instagram:   / quantified_scientist   Twitter: @QuantifiedRob Amazfit GTR 3 Firmware used: 7.22.7.1 (latest version available on my iPhone in my region on 2021-11-14) 👇 $30 off any new WHOOP membership, affiliate* (paid) link, supports 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!👇 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 📸My Gear* (paid links, supports the channel and doesn’t cost you any more)📸 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 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 over ...   ⏱️ 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.