Hemingway makes your writing bold and clear
You know what's fun?  Pasting in text from Ernest Hemingway and seeing what he did wrong.But seriously, this is a nice, simple way to point out some general rules of thumb for improving writing, although I would love for it to be less proscriptive.  Not every long sentence is a bad sentence, not every passive-voice sentence is a bad sentence, and not every adverb is a bad adverb.Oh, and by the way, the copy editor in me can't help but notice that an app that's intended to help you improve your writing tells you to "Aim for 2 or less" adverbs, rather than "Aim for 2 or fewer."