The apple I understand may be like this. There are sensors in the mobile phone to record the steps and distances, and then store them in the mobile phone, and then let other apps read these data. Apple's own health APP is an APP developed by Apple itself, and then it is given the right to read sports data, and then it can be displayed in the APP. Now the step reading permission of the health app is closed, and only the steps written by Xiaomi are kept, so that there are only the steps written by Xiaomi in the health app.
I have been drumming up the mi band these days, and the steps of WeChat, Alipay, QQ and bracelet are different. The details page in the bracelet is not the same as the first page, and I am drunk, too.