Using an editing app can reduce your editing time significantly. You also improve writing productivity when you use an editing tool because you learn as you go along.
An editing tool uses powerful algorithms to compare your content with that of thousands of published authors. It finds where your writing is clunky or awkward and helps turn your prose into a dynamic, compelling piece that gets readers' attention.
While a good, professional (human) editor is invaluable to your book – the purchase of manuscript editing software can be another prudent investment.
Editing software can't replace a human editor, but if you present him with a well-edited, highly-polished text, an editor will be able to focus on your content and ideas rather than your syntax and word choice.