Writing can be among the most mercurial of skills, in large measure because of how quickly clarity can slip through one's fingers. The Hemingway Editor provides a distraction-free writing environment with a twist. It has an Edit mode that will highlight complex sentences and common errors, compute readability scores, and estimate reading time. According to the about page, "It's like a spell checker, but for style." These features can help authors to sharpen, clarify, and simplify their prose. In addition to the free web version of the editor, a desktop version is available for purchase for both Macintosh and Windows computers.