fetch
Returns apps/devices that have contributed step-count data.
Returns an empty list on Android or if HealthKit is unavailable.
Queries HealthKit for all apps and devices that have contributed step-count data.
Returns an empty list if HealthKit is unavailable or the query fails.
Queries HealthKit for all apps and devices that have contributed step-count data.
Returns an empty list if HealthKit is unavailable or the query fails.