Joeri van Veen

The reading progress bar is a great user experience on longreads. Especially if it accurately depicts the reading progress in the article text, and nothing else. This is standard on single blog posts and enabled by default.
Customization:
<ul>
<li>
Location top of screen, bottom of screen or below sticky elements.
</li>
<li>
Select post types you wish the bar to appear, or individual posts.
</li>
<li>
Choose color of the reading progress bar.
</li>
<li>
Have the bar start at 0% even when part of the article is visible.
</li>
</ul>
Behaviour:
<ul>
<li>
The reading progress bar has smooth initializing since part of the text may already be visible, after that a lightweight update-function ensures quick response while scrolling.
</li>
<li>
The bar can attach itself to multiple (sticky) elements that you define as an admin, the first visible element will be used.
</li>
<li>
When there is no (longer a) visible element to attach to, the bar displays at the top.
</li>
<li>
Use <code>dir=rtl</code> on your html tag to have the bar display correctly for right-to-left languages.
</li>
</ul>
Estimated reading time (beta)
Since 1.6.0 this plugin has rudimentary estimated reading time functionality, for when your theme does not support it out of the box. 
There are some potential issues, some of which cannot be fixed in a plugin. If it does not work for you, switch it off. It will have no effect on the plugin then.
This is my 6th WordPress plugin but my first one freely available to everybody. I hope you enjoy using it as much as I enjoy building it!
Regards, 
Joeri

WP Reading Progress

Light weight fully customizable reading progress bar. Sticks to top, bottom or sticky menu, with fallback for small screens. Includes ert (beta).

SAM Web Design Agency

Seyyed Ahmadreza Mahjoob

Sam Reading Time (SRT) is a lightweight and efficient plugin to show estimated reading time in WordPress posts using the <code>[sam_reading_time]</code> shortcode.
Includes a minimal settings page directly accessible under the “Posts” admin menu.
Features include: 
– <code>[sam_reading_time]</code> shortcode for displaying reading time 
– Settings panel for WPM (words per minute) speed and output format 
– Clean output: “Reading Time: 4 minutes” 
– Compatible with all post types 
– Easy to use and theme-friendly 
– No external dependencies or JS 
-SEO & Rich Snippets 
-Multilingual Support
<h3>Usage</h3>
Insert the shortcode anywhere inside your post or page content:
<pre><code>[sam_reading_time]
</code></pre>
Or use it in template files like so:
<pre><code>echo do_shortcode('[sam_reading_time]');
</code></pre>
Settings can be accessed via Posts > Reading Time Settings, where you can adjust:
<ul>
<li>Words-per-minute speed</li>
<li>Prefix/suffix text around reading time</li>
</ul>
<h3>Credits</h3>
Developed by SAM Web Design Agency – https://samwda.ir
<h3>License</h3>
This plugin is licensed under the GPLv2 or later. 
See https://www.gnu.org/licenses/gpl-2.0.html for details.

Sam Reading Time

Display estimated reading time for your posts using a clean shortcode. Includes a lightweight settings panel under the "Posts" menu.

WP Reading Progress vs Sam Reading Time