No! It is not necessary to use rewriting tool. It is designed for the people with poor English to fulfill their needs. If you are a professional content writer, then it’s also useful for you. It will enable you to increase your vocabulary and synonyms memory. Recently, we have added up to 500,000 synonyms in this tool for english language and it will enable you to create content with more professionally.
Most of our customers have no problem making the less than $2 per day it costs to use WordAi. Artificial intelligence isn't cheap, and we want to provide only the best quality service possible with no compromises, and our customers appreciate the superior quality. Most of them are running their SEO sites like a business, where they don't mind paying $50/mo if it will help them make $5000/mo.
From personal experience Spin Rewriter is the best! like I still use it today. Its so easy to use (Just copy paste and the program do everything) Because of this tool I managed to schedule content and articles for 3 years, do you know how much time and money I’ve saved?!?! A LOT!!! Also i high recommend you pick their mothly plan if you are still in doubt