I'm bought the Hemingway Editor a while ago and it proved to be really handy. I use it on a daily basis to verify my writings are simple enough. Mainly I double check longer emails, meeting summaries I post to Slack and for blog posts.
Fantastic tool. Thx for developing it @adam_b_long
Definitely great for more than just writing books and blogs.
Project manager's should run their emails and directions through Hemingway. It's a great way to ensure your team and correspondent will be able to understand what you're saying.