I tested the Fitbit Inspire 2 against a scientific EEG device, and tested the heart rate and step counting accuracy.
👇Amazon Affiliate* (paid) links. Supports the channel, doesn't cost you any more!👇
Fitbit Inspire 2: https://geni.us/iZHlb
Fitbit Charge 4: https://geni.us/wjAfjU
Fitbit Sense: https://geni.us/CSfYQE8

*My opinions are completely my own. However, I do earn a small commission if you purchase any of these devices via my affiliate links. It does not cost you any more money if you use these links.

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Twitter: @QuantifiedRob

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

🧾Amazon affiliate links (Support the channel😊; I earn a small commission)🧾
--FITBIT INSPIRE 2--
USA: https://amzn.to/3bkcUUr
DE: https://amzn.to/3rXQZsN
UK: https://amzn.to/3dadlD1

--FITBIT CHARGE 4--
USA: https://amzn.to/3jNPBpz
DE: https://amzn.to/3rTLlaZ
UK: https://amzn.to/2MWdsYr

📹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
01:12 Inspire 2 Most Important Info
02:15 Results: Sleep Test Setup
03:12 Results: Sleep Test Comparison
07:09 Results: Sleep Test Overview
09:41 Results: Heart Rate Test
13:30 Results: Step Test
15:29 Conclusions
16:38 Should You Buy The Inspire 2?
17:08 Test 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)

Several small clips were used that were provided by Fitbit as part of their press kit.