Why does the "health" software in iphone take up a lot of memory without data?

Because the memory of the "healthy" software itself is very large, and the initial installation package takes up a lot of memory, even if there is not much data archived in the software, its own memory is very large.

IPhone is a series of smart phones developed by Apple in the United States, which is equipped with the iOS operating system developed by Apple. In 2007, at the annual meeting of Apple's global software developers held at the Masconi Convention and Exhibition Center in San Francisco, Jobs revealed the launch of the first generation iPhone. Apple first entered the mobile phone market in 2005, when it cooperated with Motorola to launch the iTunes mobile phone Motorola Rockr. Although this device combines mobile and music in theory, it has not attracted much interest from consumers.