Table 2.
Characteristics of smartwatches used in included studies.
| Smartwatch | Company | Country | Approximate pricea, £ (US $) | Type | Photoplethysmography | Single-lead ECGb | Food and Drug Administration clearance ECG tracking | Electrodermal activity sensor |
| Apple Watch | Apple | USA | 388 (531) | Watch | ✓c | ✓ | ✓ |
|
| Honor Watch | Honor | China | 86 (117) | Watch | ✓ |
|
|
|
| Huawei GT | Huawei | China | 89 (122) | Watch | ✓ |
|
|
|
| Gear S3 | Samsung | South Korea | 160 (219) | Watch | ✓ |
|
|
|
| Simband | Samsung | South Korea | N/Ad | Watch | ✓ | ✓ |
|
✓ |
| Honor Band | Honor | China | 45 (61) | Fitness Band | ✓ |
|
|
|
| Amazfit Healthband | Huami | China | 33 (45) | Fitness Band | ✓ |
|
|
|
| GearFit2 | Samsung | South Korea | 49 (67) | Fitness Band | ✓ |
|
|
|
| Wavelet wristband | Biostrap or Wavelet Health | USA | 180e (246) | Wristband | ✓ |
|
|
|
| Empatica E4 | Empatica | USA | 1227f (1682) | Wristband | ✓ | ✓ |
|
✓ |
aPricing as per Amazon UK website on 22/04/2021.
bECG: electrocardiogram.
cIncluded with smartwatch.
dN/A: not applicable or data not available.
ePricing as per Biostrap shop on 22/04/2021.
fPricing as per Empatica store on 22/04/2021.