Withings ScanWatch 2 (HSAT)
Withings
by ResMed • Model: NightOwl / NightOwl Mini
NightOwl is an ultra-portable home sleep apnea test (HSAT) that captures data via a single fingertip sensor. It uses photoplethysmography (PPG) and an accelerometer to record peripheral arterial tone, pulse rate, oxygen saturation, and movement, providing a clinical estimate of the Apnea-Hypopnea Index (pAHI).
Eligibility may vary by provider and plan. Check with your HSA/FSA administrator for specific details.
Evidence-based evaluation by medical professionals
"The most compact and non-invasive diagnostic sleep test available, offering the unique advantage of multi-night testing in a disposable format."
NightOwl, developed by Ectosense and acquired by ResMed, is currently the world's smallest FDA-cleared home sleep apnea test (HSAT). Measuring roughly the size of a fingertip, the sensor is applied via a simple adhesive patch and communicates directly with a smartphone app. Unlike traditional Type III tests that require chest belts and nasal cannulas, NightOwl utilizes Peripheral Arterial Tone (PAT) technology combined with actigraphy and advanced photoplethysmography (PPG). This combination allows it to derive accurate respiratory event indices (REI) and total sleep time (TST). Its most significant clinical advantage is the ability to record for up to 10 nights, allowing clinicians to capture night-to-night variability and avoid misdiagnosis based on a single 'off' night. Our clinical assessment confirms its high correlation with gold-standard polysomnography (PSG), particularly in its 4% hypopnea desaturation scoring accuracy.
Ranked #3 of 25 clinically evaluated home sleep tests devices
While ranked #3 in our clinical evaluation, this device may offer specific advantages based on individual patient needs and use cases. Review the top-rated device to understand key performance differentiators.
Verified retailers and current pricing
Prescription consultation available; FSA/HSA eligible.
Includes initial telehealth consultation and 2 nights of testing.