The discrepancy between the three-ring data on the Mi Fitness APP and the Xiaomi Smart Band 9 Active can occur for several reasons:
1. If the difference is small, it is due to the fact that the data on the band is synchronized once per minute, while the APP automatically syncs with the band only once every 30 minutes. This delay in synchronization can cause minor inconsistencies. To ensure more accurate data, manually sync in the Mi Fitness APP and check again;
2. If the difference is large, it is because the data in the Mi Fitness APP comes from other devices or sources, such as a connected smartphone, whereas the band only records data from the band. This can result in discrepancies in the displayed activity data.