I tested the Withings Sleep Analyzer against a scientific EEG device. Subscribe to my weekly Newsletter(!) on www.robterhorst.com, Instagram:   / quantified_scientist  
Twitter: @QuantifiedRob
👇Amazon Affiliate* (paid) links. Supports the channel, doesn't cost you any more!👇
Withings Sleep Analyzer: https://geni.us/w9kUJ
Fitbit Charge 4: https://geni.us/wjAfjU
Fitbit Sense: https://geni.us/CSfYQE8
Fitbit Inspire 2: https://geni.us/iZHlb

*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.

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

📹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  

📹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 (...  

📹Huawei Videos📹
Watch Fit Heart Rate:    • Huawei Watch Fit Review: Heart Rate A...  
GT 2 Pro:    • Huawei Watch Science Test: GT 2 Pro R...  

📹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...  

⏱️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 Sleep Algorithm
01:48 Withings Sleep v.s. Sleep Analyzer (difference)
02:55 Results: Sleep Test Setup
03:54 Results: Sleep Test Comparison
08:27 Results: Overview Analysis
10:57 Results: Comparison to First Generation
11:49 Results: Comparison to Fitbit and Huawei
12:24 Conclusions
13:13 Should You Buy The Sleep Analyzer?
14:04 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)