Flex is a reading content analysis service for writers. This is also known as "text leveling." FLEX analyzes text that you have written so that you can be sure that it is understandable for your readers.
All you have to do is paste in the text to be analysed and FLEX does the work for you. A variety of of readability scores are provided in the analysis results including:
The analysis also includes sentence and word counts, unique words, unknown words, syllables, etc.
Once the analysis is complete, hard sentences, words and medium difficulty words are all highlighted for you. You can then edit the text and re-run the analysis as often as you like.