Before WordAi even starts spinning, it reads the entire article to understand both "generally" what the article is about and the "specifics" as to what exactly happens in the article. This allows WordAi to create complicated paragraph and document level spins based on its deep understanding of the article. Because no other machine has this level of deep understanding, it makes your content look human written. It is even able to correctly write high quality titles by identifying what the article is talking about.
There are many people who still prefer rewriting their articles by hand. They are used to write sentence after sentence and rephrase their content to ensure the quality of writing. Although it is the safest approach but it can take hours or days to complete a task. On the other hand, there also exist people who are either too lazy to rewrite their content or they understand the importance of time and hence, they look for an article spinner tool or paraphrasing tool. 

Owner is a scammer who has been banned from major SEO forums for fraudulent and deceptive practices. You might be willing to look past the fact that the owner of this product creates fake accounts to post fake reviews and lies about the product if the product itself was actually good, but unfortunately Spinner Chief itself is filled with half baked buggy features (which are advertised as working completely) and can't go more than 10 minutes without crashing. All in all it is a complete waste of money and time.
QuillBot is a state-of-the-art paraphrasing tool. It is the best article rewriter available, and can completely paraphrase an entire article for free. Simply input a sentence, and hit the "Quill It" button. QuillBot will then rephrase the content while maintaining the original meaning. You can then click on any of the words or phrases to have a drop down thesaurus appear which can then provide further edits in order to optimize your sentence. It is the best article spinner out there. We will even provide statistics to how fluent the sentences are, and how much they have changed. QuillBot can also function as a grammar checker and fluency enhancer. In addition to this, it can provide you with creative suggestions on your sentences. We labeled the software as a "smart thesaurus for sentences" or a full-sentence thesaurus. QuillBot underlying technology uses complete machine learning. This means that when you interact with the website, you are providing data that will be used to improve QuillBot's proficiency. This also means that the version you are using will be the worst version of the model, and that it will constantly improve. Users have been uitilizing QuillBot for a variety of purposes. They use QuillBot as an SEO optimizer tool, in order to improve their writing, or simply get over writers block. The language that QuillBot produces is natural, and will improve overtime as well. Our mission is to achieve human-level paraphrasing. Once we achieve this task, we will aim to produce language in particular linguistic styles or degrees of sophistication. We will even allow users to control the degree of permutation that the paraphrasing tool produces. This will give users complete control over QuillBot and the ability to manipulate language to meet their needs. While our goals our ambitious, we see a clear path forward towards achieving them!