Why isn't WeChat SMS synchronized to the bracelet?

SMS will only be sent to your mobile phone card, and you can't set SMS synchronization to other applications.

Through the smart bracelet, users can record real-time data such as exercise, sleep, and some diets in daily life, and synchronize these data with mobile phones on an equal footing, thus playing a role in guiding healthy life through data. The bracelet can also record your steps and the calories and fat you consume every day.