Device research record
Withings ScanWatch
Signals and sensors
From the device record. Fields the source does not state are left out.
- Maker
- Withings
- Form factor
- Wrist
- Series
- ScanWatch
- Signals recorded
- PPG, Accelerometer, ECG
- Also called
- ScanWatch
What published studies show
Results quoted from 6 published validation studies, each against a clinical reference. A result applies to the model and protocol tested, not to every model the brand sells. From the wearable accuracy database (v1.0.0).
Heart rate at rest1 study
| Device tested | Result | Reference | Sample | Study |
|---|---|---|---|---|
| Withings ScanWatch | MAPE < 10% in all domains except shopping (10.8%); < 5% when sedentaryStudy finding (no single number) | ECG chest strap (Polar H7/H10) | n = 7, 12-h free-living | Giggins et al. (2022)Independent |
- Withings ScanWatchMAPE < 10% in all domains except shopping (10.8%); < 5% when sedentary
Study finding (no single number) · vs ECG chest strap (Polar H7/H10) · n = 7, 12-h free-living
Giggins et al. (2022) Independent
Sleep stages (4-stage)1 study
| Device tested | Result | Reference | Sample | Study |
|---|---|---|---|---|
| Withings ScanWatch | κ = 0.22Cohen's kappa | Polysomnography (PSG) | n = 41, Sleep laboratory, 1 night | Schyvens et al. (2025)Funding not reported |
- Withings ScanWatchκ = 0.22
Cohen's kappa · vs Polysomnography (PSG) · n = 41, Sleep laboratory, 1 night
Schyvens et al. (2025) Funding not reported
Sleep vs wake (2-stage)1 study
| Device tested | Result | Reference | Sample | Study |
|---|---|---|---|---|
| Withings ScanWatch | > 90% (all devices)Sensitivity | Polysomnography (PSG) | n = 62, Sleep laboratory, 1 night | Schyvens et al. (2025)Funding not reported |
- Withings ScanWatch> 90% (all devices)
Sensitivity · vs Polysomnography (PSG) · n = 62, Sleep laboratory, 1 night
Schyvens et al. (2025) Funding not reported
Blood oxygen (SpO2)3 studies
| Device tested | Result | Reference | Sample | Study |
|---|---|---|---|---|
| Withings ScanWatch | Highest missingness: 69.5% of attempts successfulStudy finding (no single number) | Medical-grade pulse oximeter | n = 49, Spot readings, with and without chronic pulmonary disease | Jiang et al. (2023)Independent |
| Withings ScanWatch | Met ISO RMS ≤ 4% at normoxia and SpO2 < 90%Study finding (no single number) | Medical-grade pulse oximeter | n = 18, Induced hypoxemia (FiO2 14%, 12%, 10%), ISO 80601-2-61 | Walzel et al. (2023)Independent |
| Withings ScanWatchdetecting clinically significant hypoxia | 68.5% (spec 80.8%)Sensitivity | Medical-grade pulse oximeter | n = 200, Hospital ward, COVID-19 inpatients | Rajakariar et al. (2024)Independent |
- Withings ScanWatchHighest missingness: 69.5% of attempts successful
Study finding (no single number) · vs Medical-grade pulse oximeter · n = 49, Spot readings, with and without chronic pulmonary disease
Jiang et al. (2023) Independent
- Withings ScanWatchMet ISO RMS ≤ 4% at normoxia and SpO2 < 90%
Study finding (no single number) · vs Medical-grade pulse oximeter · n = 18, Induced hypoxemia (FiO2 14%, 12%, 10%), ISO 80601-2-61
Walzel et al. (2023) Independent
- Withings ScanWatch68.5% (spec 80.8%)
Sensitivity, detecting clinically significant hypoxia · vs Medical-grade pulse oximeter · n = 200, Hospital ward, COVID-19 inpatients
Rajakariar et al. (2024) Independent
Atrial fibrillation detection1 study
| Device tested | Result | Reference | Sample | Study |
|---|---|---|---|---|
| Withings ScanWatchsmartwatch ECG app, inconclusive tracings counted | 58% (spec 75%)Sensitivity | 12-lead ECG | n = 201, Tertiary cardiology service, single-lead ECG algorithms | Mannhart et al. (2023)Funding not reported |
| Withings ScanWatchsmartwatch ECG app, inconclusive tracings counted | 75%Specificity | 12-lead ECG | n = 201, Tertiary cardiology service, single-lead ECG algorithms | Mannhart et al. (2023)Funding not reported |
- Withings ScanWatch58% (spec 75%)
Sensitivity, smartwatch ECG app, inconclusive tracings counted · vs 12-lead ECG · n = 201, Tertiary cardiology service, single-lead ECG algorithms
Mannhart et al. (2023) Funding not reported
Specificity, smartwatch ECG app, inconclusive tracings counted · vs 12-lead ECG · n = 201, Tertiary cardiology service, single-lead ECG algorithms
Mannhart et al. (2023) Funding not reported
Comparisons
Head-to-head pages that name Withings ScanWatch come first, then other comparisons for the brand.
Articles that mention Withings ScanWatch
- PPG Sleep Apnea Detection
- PPG Home Telehealth Monitoring
- PPG Wearable Accuracy During Sleep: Heart Rate and HRV Validation
- ECG vs Heart Rate Monitoring: Electrical Signals vs Optical Pulse Detection
- PPG Heart Rate Sensor Explained: Optical Modules, Multi-LED Design, and Motion Compensation
- Remote Monitoring of Vital Signs with PPG: Platforms, Evidence, and FDA Status
- PPG for Cardiac Monitoring: From Heart Rate to Heart Failure Detection
- PPG Heart Rate Accuracy: What the Research Actually Shows