[X4]

Good point! The tool should create a reading difficulty score and only offer selecting wpm, if it's beneficial.

Readability tests:

    * Accelerated Reader ATOS
    * Automated Readability Index (ARI)
    * Coleman-Liau Index
    * Dale-Chall Readability Formula
    * Flesch-Kincaid readability tests:
        * Flesch Reading Ease
        * Flesch-Kincaid Grade Level
    * Fry Readability Formula
    * Gunning-Fog Index
    * Lexile Framework for Reading
    * Linsear Write
    * LIX
    * Raygor Estimate Graph
    * SMOG (Simple Measure Of Gobbledygook)
    * Spache Readability Formula

Tool: https://readability-score.com/ Source: http://en.wikipedia.org/wiki/Readability_test#Readability_te...