Iphone 1 1 its adapted version is iOS 13. Many people may say that the best version is its factory version. Because Ios 13 is the original version of iphone 1 1, it is recommended that you choose to update to the latest version. Although there may be some problems in the latest version, the latest version definitely fixes some bugs that have appeared before.
iOS？ 13- Functions of Health Applications
Health App in iOS? 13 will have some updates, such as the new home screen will have a better overview of daily activities, and a new function of "hearing health" will be added, which will record the volume of music you play on headphones and the loudness of the external environment, as well as the menstrual cycle tracking of female friends and so on.