Are there ready-made applications for the site with the ability to post to the user?

Question

Android

Are there ready-made applications for the site with the ability to post to the user?
Either free with conditions or for rent.
So that the user can post, write comments, register, profile to a minimum.

Answer 1

You can search the app store, but it's better to hire a programmer and write your own application to customize it for yourself.

Answer 2

The Xmlrpc protocol is used for this.
A cloud of such applications in Google Play.
Engines: Wp, joomla, etc.