Best Wearables for Sleep Tracking: 2026 Update! (Scientific Review)
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2025 and 2024 saw releases of many smartwatches and wearables including rings, straps, and biceps bands that track sleep, heart rate, and more. Focus is on sleep stage tracking, as all manufacturers claim accuracy. Evaluate performance in 2026 based on data from devices released in the last two years.
Rewrote code for best overview of sleep stage tracking performance across brands and devices. Separate analysis for 2025 and 2024 releases, as older devices are cheaper but lack latest firmware.
Plot compares 2025 devices against ZMAX EG headband (designed for scientific sleep stage tracking, close to gold standard polysomnography). Horizontal axis: average sensitivity over deep sleep, light sleep, and REM sleep. Vertical axis: worst of those three stages. Better performance is top-right.
- Worst: Huawei devices (bottom-left).
- Best (top-right): Eight Sleep Pod, Apple Watch Ultra 3, Apple Watch Series 11, Oura Ring 4 ceramic, Whoop Strap MG, Pixel Watch 4. Galaxy Watch 8 also strong, but Classic and Ultra 2 slightly worse; average performance likely middle-top due to shared algorithms across Samsung devices. Samsung improving significantly.
Middle performers: Amazfit Helio strap, Garmin devices (Forerunner 570, 4970, Venu X1, Instinct 3, Venu 4) struggle with REM sleep. Same for Polar Loop, most sport watches, Suunto.
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