WHB-Spinner|Chief will not only generate a huge selection of new posts in moments for you personally, but also in a single click it could rewrite content to an extremely high level of human readability and uniqueness since it uses THE VERY BEST Natural Language Evaluation and Artificial Cleverness ways to understand your write-ups just as as Google does.
But still, this tool is guaranteed to be very useful, and every writer can use it whenever they wish to do some rewriting, and this tool can be educational especially if you want to learn how to revise words the right way. This is a great teacher and helper for your work, and rest assured that using this will be as easy as opening up your program for writing!

It's a long, long job to research your keywords, keyword phrases, LSi's etc and then to write content for your chosen search term that has the perfect keywords, and the perfect density of those keywords. This plugin looks at the top 10 Google SERPS for your search term, compares them to each other, and then tells you the keywords that ALL the top 10 pages are using in their content, PLUS the density of those keywords. In less than a minute you will know EXACTLY which keywords and their relevant density to include in your website copy so that it matches Google's exact keyword expectations. Click here for more details.

Imo it is not possible for google to detect properly spun content, it is not worth computing power it requires. They can do this using ngrams for example, but it is uses a lot of queries. And for example article spinner I coded beats this algo, so google cant detect that the content is spun. Manual spinning is also good but it takes more than 30 minutes per article.