Table 6.
Brand summary.
| Brand | Fitbit | Garmin | Misfit | Apple | Polar | Samsung | Withings | Mio | PulseOn | TomTom | Xiaomi | MyKronoz | No. 1 | |
| Devicesa | 9 | 40 | 8 | 3 | 11 | 12 | 2 | 3 | 1 | 7 | 3 | 18 | 19 | |
| MEDLINEb | 54 | 22 | 12 | 8 | 6 | 5 | 5 | 5 | 4 | 2 | 1 |
|
|
|
| Validation or reliabilityc | 40 | 18 | 12 | 6 | 6 | 5 | 5 | 5 | 4 | 2 | 1 |
|
|
|
|
|
Steps | 21 | 10 | 6 | 1 | 2 | 2 | 4 |
|
|
|
1 |
|
|
|
|
Energy expenditure | 10 | 4 | 3 | 4 | 3 | 1 |
|
2 | 2 |
|
|
|
|
|
|
Heart rate | 7 | 4 | 1 | 4 | 1 | 2 |
|
5 | 4 | 2 | 1 |
|
|
|
|
Sleep | 8 | 1 | 4 |
|
1 |
|
2 |
|
|
|
|
|
|
|
|
Other | 3 | 4 | 2 |
|
1 |
|
|
|
|
|
|
|
|
| ClinicalTrialsd | 31 | 3 | 1 | 2 | 4 | 2 | 2 | 3 | 1 | 1 | 1 |
|
|
|
| SDKe | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
|
|
|
|
|
|
|
|
| APIf | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
|
|
✓ |
|
|
|
|
| Apple Healthg |
|
|
✓ | ✓ | ✓ |
|
✓ | ✓ |
|
|
✓ |
|
|
|
| Google Fith |
|
|
✓ |
|
✓ |
|
✓ | ✓ |
|
|
✓ |
|
|
|
aNumber of unique devices.
bMEDLINE: Medical Literature Analysis and Retrieval System Online. Number of articles in MEDLINE.
cNumber of validation or reliability studies in MEDLINE, grouped by metric (step, EE, HR, sleep, and others).
dNumber of active projects in ClinicalTrials.
eSupports an SDK for third-party software implementation.
fAPI: application programming interface. Supports an API for developer access to data cloud.
gSupports automatic synchronization to Apple Health data cloud.
hSupports automatic synchronization to Google Fit data cloud.