The blood sugar test function of Huawei WATCH 4 Pro watches is realized by built-in sensors and monitoring technology, and does not rely on mobile phones. According to Huawei official website, if you want to get more accurate blood sugar data, you need to wear it for at least 2 hours during the day, at least 4 hours at night, and wear it continuously for 7- 14 days. During this period, the watch will automatically monitor blood sugar and display the evaluation results on the watch, including low risk, medium risk and high risk. Therefore, the blood sugar test function of Huawei WATCH 4 Pro is independent of the mobile phone, and users can easily monitor and evaluate blood sugar.