Rigorous, engineering-led analysis of sleep technology. We evaluate CPAP machines, wearables, and environment tech against clinical data—cutting through marketing claims with actual hardware testing.
Consumer sleep trackers consistently overestimate total sleep time (TST) and misidentify sleep stages, particularly REM vs Wake, when compared to clinical Polysomnography (PSG). We look at the actual hardware sensors and validation studies, not the marketing claims.
Wrist-worn PPG sensors struggle with high-frequency heart rate variability (HRV) during movement, leading to dropped data packets.
Proprietary "recovery scores" often overweigh acute HRV changes while ignoring chronic accumulated sleep debt.
Sleep stages are defined by brainwaves (EEG). Wearables estimate them via autonomic nervous system proxies, creating an inherent margin of error.
Unlike consumer gadgets, CPAP physically forces the airway open using a calibrated column of air. We analyze pressure delivery curves, Expiratory Pressure Relief (EPR) lag, and humidification thermal output.
Standard clinical formulas implemented for immediate use. Data remains local to your browser.
Calculate SE percentage. Essential metric for CBT-I restriction protocols.
Algorithm for adjusting Time-in-Bed based on weekly sleep logs.
Estimate accumulated deficit over a rolling 7-day period.
Calculate optimal administration window based on estimated DLMO.
Using targeted lux exposure (>10,000 lux) and specific nanometer wavelengths (480nm cyan) to inhibit melatonin synthesis and induce phase shifts for jet lag or shift work.
Active cooling mattresses that manipulate core body temperature via continuous circulation of chilled water, facilitating faster sleep onset and increased slow-wave sleep duration.
Raising the acoustic floor of the bedroom to mask disruptive transient sounds. Analysis of pink noise vs white noise on sleep spindle frequency during NREM sleep.
Digital implementations of stimulus control and sleep restriction therapy, proven to out-perform pharmacological interventions for chronic insomnia in longitudinal studies.
Our analysis relies on peer-reviewed clinical literature and independent hardware testing. We do not accept sponsorship from manufacturers of CPAP machines, wearables, or mattresses.