The only differences I can find between this and http://gender-decoder.katmatfield.com/ http://gender-decoder.katmatfield.com/ is that it highlights spelling er

The only differences I can find between this and http://gender-decoder.katmatfield.com/ http://gender-decoder.katmatfield.com/ is that it highlights spelling errors and repeated words. Not sure how you can justify $99p/m when there are plenty of tools that do the exact same job for free.