2.iOS user data can't be synchronized: Make sure that the version of Sports Health App is the latest version, and the Bluetooth connection between Sports Health App and Glory Watch ES is normal. Pull down the home page of sports health App and try to synchronize manually. If you still can't synchronize, please restart Glory Watch ES and try again. If you still can't sync, try disconnecting and reconnecting Bluetooth, and then try to sync. If you still can't synchronize the data through the above methods, please close and clear the sports health App from the background of the mobile phone, then reopen it and try to synchronize again.