Distance calculated by Tracker is less

GOQii Tracker is not GPS enabled.
The tracker/band may show less distance than the distance you had covered while running. This could be due to the difference in stride length while walking and running. GOQii tracker/band calculates distance by multiplying your walking steps by the stride length. The tracker/band is designed to calculate the stride length using height, weight and gender of any individual. Since the tracker is not GPS enabled, there may be a discrepancy in distance travelled shown when compared with a GPS enabled device.