There's also something called the Hemingway Editor.
http://www.hemingwayapp.com/I've used it a time or two. My only real complaint is that it treats a conversation much the same as a scientific encyclopedia, meaning it cannot tell what should be slang and what should not. It thinks a chat between two old friends should be English professor correct.
But, as far looking at the descriptive parts of your story, it does a good job of breaking down what you have. It can even show when you're being passive.
It's not perfect by any means, and it really bogs down when you copy and paste thousands and thousands of words, but it is a useful tool.