SalvatoreDP

WP Readability Analysis is a wordpress plugin that calculates the index 
of readability of a post or page using various methods: Gulpease, Gunning-Fog, 
Flesch and Flesch-Kincaid. 
With these formulas we try to analyze how difficult it is to read a text.
The method Gulpease, calibrated for the Italian language, unlike the other 
is based on word length in letters rather than syllables.
Methods Flesch-Kincaid and Flesch, who are the most famous, using formulas based 
on the average number of words per sentence and the average number of syllables per word.
The method Gunning-Fog uses a formula based on the average number of words per 
sentence and the percentage of words with 3 or more syllables.
Unlike Gulpease, these three methods are mainly used in the English language. 
Both Gunning-Fog that Flesch-Kincaid return a score which is the number of 
years of education that the user must have to understand the text.
I invite you to know more about the various pages of wikipedia devoted 
to the various formulas.

WP Readability Analysis

Shows readability analysis of the post or page using Gulpease, Gunning-Fog, Flesch and Flesch-Kincaid readability measurements.

AS OF MAY 2016, THIS PLUGIN IS NOT BEING MAINTAINED AND WILL NOT RECEIVE ANY FUTURE UPDATES. 
CONTACT ME IF YOU’D LIKE TO LIST AN ALTERNATIVE HERE.
Shows word and sentence counts plus a readability analysis of the post 
currently being edited using three different readability measurements.
Readability analysis is an attempt to show how difficult a text is to read. 
There are several methods of doing readability analysis. The most popular 
methods are used here. The Flesch and Flesch-Kincaid methods use formulas based 
on the average number of words per sentence and the average number of syllables 
per word. The Gunning-Fog method uses a formula based on the average number of 
words per sentence and the percentage of “hard” words (words with 3 or more 
syllables) in the passage.
Both the Gunning-Fog and the Flesch-Kincaid give a score that is the number of 
years of education the reader must have completed to understand the text. 
Different types of writing calls for different scores. Technical subjects may 
require a higher level of education so a higher Fog or Kincaid score is 
acceptable. Informal writing may try for a score in the 7-10 range. The Flesch 
score is a percentage. The higher the value, the better the readability.

FD Word Statistics Plugin

Shows word and sentence counts plus a readability analysis of the post currently being edited using three different readability measurements.

WP Readability Analysis vs FD Word Statistics Plugin