Bon Plan Gratos

This plugin gives you the possibility to display ratings on posts / pages and also on Google search results.
It is extremely light, very fast to load, comptabible with all versions of WordPress and will not break any of your plugins. It is inspired of similar existing plugins, but remains very simple. As you know, page speed is a factor to increase Google ranking, as well as the use of rich snippets.
<h4>Important</h4>
Rating function is voluntarily limited to authors (only authors can rate, and not visitors) through the admin panel, in order to remain as light and fast as possible.
<h4>Main functionnalilties</h4>
<ul>
<li>Rating from 0 to 5, with a 0.5 step, in the post edit screen, </li>
<li>Use of Google snippets to help Google to display ratings in search results,</li>
<li>Rating tags detected in Google Webmaster Data Highlighter tools,</li>
<li>No use of javascript / ajax to improve loading,</li>
<li>Different format of ratings available (star, heart, gradient),</li>
<li>Use of sprites to improve loading of PNG images,</li>
<li>Automatic display of ratings in posts, pages or both,</li>
<li>Possibility to display ratings in posts through ‘shortcode’,</li>
<li>Possibility to display ratings anywhere with ‘php function’.</li>
</ul>
<h4>Additional information / help</h4>
More information on shorcode, PHP function, etc… on plugin web page: 
http://bonplangratos.fr/wp/plugins/google-quick-ratings

Google Quick Ratings

The lightest and fastest plugin to rate posts and pages by their authors, comptatible with Google rating snippets.

Fahid Javid

Stars Rating transforms WordPress comments into a fully featured review system. It is simple to set up, highly configurable, and designed to keep your Media Library and admin clean no matter how many reviews come in.
Its main features are as follows:
Star Ratings 
* Turns posts, pages and custom post types comments into star-rated reviews. 
* Choose which post types have ratings enabled, globally and per post. 
* Option to require a star selection before a comment can be submitted. 
* Choose from two star styles (regular outline or solid filled) with a custom colour picker. 
* Display the average rating above the comments section. 
* Offers a shortcode [stars_rating_avg] to display the average rating anywhere. 
* Hide the average rating text: [stars_rating_avg show_text=”no”]. 
* Hide an empty average rating: [stars_rating_avg show_empty_rating=”no”]. 
* See each review’s star rating on the WordPress comments screen (backend).
Review Photos 
* Allow reviewers to attach photos to their comments. 
* Photos are stored in a dedicated folder (wp-content/uploads/sr-reviews/) — completely separate from the WordPress Media Library to keep it clean. 
* Photos open in a per-review lightbox gallery on the front end. 
* Manage and delete individual review photos from the comment edit screen in the admin. 
* Configure max number of photos, max file size, and max image dimension per upload. 
* Restrict photo uploads to logged-in users or allow everyone.
Likes & Dislikes 
* Add thumbs-up / thumbs-down buttons to posts on any post type. 
* Show or hide vote counts next to each button. 
* Restrict voting to logged-in users or allow everyone. 
* SVG icons ensure consistent rendering across all browsers and devices.
Negative Rating Alert 
* Show a popup when a reviewer selects a low star rating, giving them a chance to reach out before posting. 
* Set the rating threshold that triggers the alert. 
* Configure a direct link to your contact page inside the alert.
Google Rich Snippets 
* Output JSON-LD structured data so star ratings can appear directly in Google search results. 
* Set the review type (Product, Recipe, Book, Course, etc.) to match your content.
Labels & Messages 
* Customise every user-facing string — prompts, button labels, alert text, error messages — directly from the settings page without editing any code.
Settings 
* Organised settings page with tabbed navigation (Stars & Reviews, Likes & Dislikes, Labels & Messages) for quick access to each feature area.

Stars Rating

So i was looking for some simple star rating system, that would support schema and had as least bloat as possible. I thought i found what i was looking for, unfortunely this is not the case.

For simple usage it's ok, but there's two major drawbacks:
* Can't use it outside specified post/page/cpt, i.e. you wanna list ratings on loop somewhere? Too bad. 
* WHOLE Font Awesome library for simple star icon and it's added to plugin TWICE! Who does that? Without all that FA bloat plugin weight goes down to ~170kb from almost 2MB.

Also i'm not sure that author of the plugin understands support enquiries, but that might be just my speculation.

Acceptable quality at most

Very Good

Does what it says. I tried 3 other Plugins to get my CPT ratings, but due to heavy customization in the comments template (and form) none of them worked. This one integrates without any problems.

The only thing I'd like to see is an option to hide or customize the average rating text - for now it's not possible to only show the average number without additional text.

Hiding all text with CSS doesn't work too, because the text is in plain HTML without a class. I would like to have it like this:

<div class="stars-avg-rating">
 ...
 3.5 based on 2 reviews
</div>




Would enable more options for styling.

Works great!

A complete review plugin — star ratings, photo uploads, likes & dislikes, and Google rich snippets, all from one place.

Google Quick Ratings vs Stars Rating