The steps of the watch and the third-party applications are not stacked statistics, but take the maximum value. Such as watch steps number 2000 steps, the third-party applications steps number 2500 steps. After synchronization, the third-party applications still show 2500 steps. If the watch steps number 2500 steps, the third-party applications step number 2000. After synchronization, the third-party applications will be updated to 2500 steps, taking the maximum value.