8suzuran8

This plugin is does not update the theme.
If you plan to distribute theme without published in the official directory, 
and when the different theme of the same name exists in the official directory, 
the use to prevent unexpected updates.
For example, if you want to sell for a fee. 
For example, if you creates and do not want to distribute. 
For example… 
For example… 
For example…

Without Update Themes

ThemeZee

The WP Theme Changelogs plugin allows you to view the changelog before updating a theme, very similiar to the available changelogs for plugins.
<h4>How does this work?</h4>
The plugin parses the readme.txt of the theme to get the changelog details. In order to work, your theme must have a valid readme.txt including a changelog section.

WP Theme Changelogs

Hace lo que promete. Ojalá pronto sea obligado poner los changelogs en archivos readme.txt en el directorio de temas.

Y sino que se incluya esta funcionalidad en el núcleo de WP

Funciona perfecto

Adding changelogs for themes hosted on wordpress.org by parsing their readme.txt

Without Update Themes vs WP Theme Changelogs