This program will help if your phone (typically Huawei and Honor) will not sync with your Fitbit device after a while. Maybe working with other incompatible phones.

Every phone and problem is unique. If this program does not work for you, please do not rate it down. Someone else may want to find it because it might work for him.

Tested on Honor 10, Huawei P20, P20 lite phones, and with Fitbit Versa and Ionic.
According to reports it works with Moto G5+ as well
EMUI 9 compatibility testing in progress ...

May can work with the following Fitbit devices:
Classic, Ultra, One, Flex, Force, Charge, Charge HR, Surge,
Blaze, Alta, Flex 2, Alta HR, Ace, Inspire, Inspire HR, Ace 2
Based on feedback, it works on:
Ionic, Versa, Versa lite, Charge 2, Charge 3

Play store link
Fitbit App Settings
How to turn off battery optimization on Huawei devices
Install Fitbit old App