What percentage is the server part of the application?

Question

css

What percentage of mobile development is occupied by the server side?
App "another social network"

Answer 1

<div css="header-image" style="background-image: url('/pathToImage')"></div>

.header-image {
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  padding-bottom: 40%;
}

Demo.

Answer 2

It's not entirely clear what the problem is

Answer 3

It depends on architecture and functionality.
Interest is a relative thing - from what value do we consider them?

Answer 4

in social network it is about 99 percent backend
well, if you have a social network, of course, where there are billions of users and all that,
and if it’s a shitty site, then you can just send it to php in a week