ReadEase: Readability Score Calculator 作者: Kuwin Day

Calculates and displays Flesch-Kincaid Grade Level and Flesch Reading Ease scores
Shows word count, sentence count, average words per sentence, and average syllables per word
Highlights difficult sentences (optional and customizable)
Customizable minimum word count for analysis
Options page for easy customization
Popup with quick access to results and options
Refresh button to recalculate scores
Works with dynamic content changes
Error handling for insufficient content
Persistent settings across browser sessions