Device research record

Garmin Vivosmart 4

3 Validation results
1 Comparisons

Signals and sensors

From the device record. Fields the source does not state are left out.

Maker: Garmin
Form factor: Wrist
Series: Vivosmart 4
Family: Garmin smartwatch
Signals recorded: PPG, Accelerometer
Also called: Vivosmart 4

What published studies show

Results quoted from 2 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).

Sleep stages (4-stage)1 study

Device tested	Result	Reference	Sample	Study
Garmin Vivosmart 4	κ = 0.21Cohen's kappa	Polysomnography (PSG)	n = 25, Sleep laboratory, 1 night	Schyvens et al. (2025)Funding not reported

Garmin Vivosmart 4κ = 0.21
Cohen's kappa · vs Polysomnography (PSG) · n = 25, Sleep laboratory, 1 night
Schyvens et al. (2025) Funding not reported

Sleep accuracy across devices →

Sleep vs wake (2-stage)1 study

Device tested	Result	Reference	Sample	Study
Garmin Vivosmart 4	> 90% (all devices)Sensitivity	Polysomnography (PSG)	n = 62, Sleep laboratory, 1 night	Schyvens et al. (2025)Funding not reported

Garmin Vivosmart 4> 90% (all devices)
Sensitivity · vs Polysomnography (PSG) · n = 62, Sleep laboratory, 1 night
Schyvens et al. (2025) Funding not reported

Sleep accuracy across devices →

Blood oxygen (SpO2)1 study

Device tested	Result	Reference	Sample	Study
Garmin Vivosmart 4	3.3% (rest)Root-mean-square error	Medical-grade pulse oximeter	n = 36, Rest, COPD outpatients	Støve et al. (2023)Funding not reported

Garmin Vivosmart 43.3% (rest)
Root-mean-square error · vs Medical-grade pulse oximeter · n = 36, Rest, COPD outpatients
Støve et al. (2023) Funding not reported

SpO2 accuracy across devices →

Comparisons

Head-to-head pages that name Garmin Vivosmart 4 come first, then other comparisons for the brand.

Other versions

Garmin Fenix 6 Garmin Forerunner 245 Garmin smartwatch

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