Apple Watch Sleep Tracking Tested Against a Dreem 2
The Quantified Scientist · Demo · 18 min · 2022 · YouTube title: Apple Watch : Scientific Sleep Test
Why it's here
HN commenters cite it as evidence that Apple Watch is the most accurate consumer sleep tracker and trust the channel for its scientific approach.
What it covers
The Quantified Scientist, a sleep researcher, tests Apple Watch sleep tracking against a research-grade Dreem 2 headband, comparing accuracy for sleep stages, deep and REM sleep. The review is data-focused rather than feature-focused.