Hemingway Editor vs ProWritingAid
Hemingway gives you a fast, color-coded readability gut-check. ProWritingAid gives you 20+ detailed reports that dissect your writing at every level. One is a quick scan, the other is a full physical.
Verdict
Use Hemingway for a 30-second readability check before publishing — the free web version is perfect for that. Use ProWritingAid when you're serious about improving a long-form piece. They work beautifully together: Hemingway for the quick scan, ProWritingAid for the deep edit.