@Kelzoni951 that hasn't been my observation exactly. I would say depending on the device and OS it may require more or less troubleshooting. In Huawei's case, the first thing really to do is to deal with their battery optimization. Huawei phones kill anything and everything including Fitbit app. In case, of iPhone, it seems as the latest iOS update is problematic. I haven't updated my old iPhone 7 and no issues there.
Best Answer