marcinfilipiak

ReadTrack is a lightweight plugin that improves the user experience by displaying: 
– ⏱️ Estimated reading time based on post word count 
– 📊 A visual progress bar that fills as the reader scrolls
You can fully customize the text shown before the post using a settings page in the WordPress admin panel. The default template is:
<pre><code>⏱️ Estimated reading time: %minutes% min
</code></pre>
Simply place <code>%minutes%</code> in your message to dynamically show the calculated reading time.
New in version 1.2: 
– The plugin now uses the WordPress database (via <code>get_option()</code> / <code>update_option()</code>) instead of saving configuration to a file in the plugin folder. 
– This ensures full compatibility with WordPress.org guidelines and multisite installations.
<h3>License</h3>
This plugin is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License v2 or later.

ReadTrack

Adds a reading progress bar and an estimated reading time above each single post.

layerpoint

Let your readers know how much time the blog post will take for reading. This plugin creates an estimated reading time of your posts that is inserted above the content or by using a shortcode. Automatically updates the read time based on the updates the blog post recieves.
The plugin is completely customizable using the Dashboard Settings. You can activte or deactivate the plugin, style it with the default classes or add your own custom classes. You can also set an estimated number of words read per minute. You can additionally add extra content before and after the estimated reading time as per your needs.

LP Estimated Reading Time

Very Good

Displays an estimated reading time of your blog posts

ReadTrack vs LP Estimated Reading Time