Every tracking device has its own tracking algorithm and only serves as an estimate to the actual step count, MVPA and sleep duration as it is affected by each individual’s walking gait and arm swing.
Hence, like all commercial fitness trackers, each model of HPB fitness tracker will have its own attuned sensitivity that may have varying degrees of accuracy in the steps/heart rate/sleep duration tracked.
To reduce occurrences of inaccurate readings, ensure that the tracker is worn properly on the wrist.