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.

SpinnerChief API is the function that allows other developers to use SpinnerChief functions in their softwares and users can use SpinnerChief functions in other softwares directly. As users, you need to register a SC web account to use the api in other software. As developers, you need to register at to get an apikey to use in your software. The developers who have already integrated the SpinnerChief API are.
Spinrewriter has a decent Google pagerank and bad results in terms of Yandex topical citation index. We found that is moderately ‘socialized’ in respect to Facebook shares (20.2K) and Google+ shares (41). According to MyWot, Siteadvisor and Google safe browsing analytics, is quite a safe domain with mostly positive visitor reviews.
This software serves a purpose and fills a gap in the market. Many people will buy this software as they believe its a fast way of creating content. Others will buy the software so that it interacts with another piece of software like Article Marketing Robot for instance. No doubt this software will make many thousands in profits. Personally, I won’t be getting involved and here’s why…

New customers will receive a huge discount offer. Spin Rewriter gives you a lot of quality written content in a short period of time. Clients receive a 5-day free trial for using their services, but after 5 days you still get 30 additional days to make sure the Spin Rewriter technology is right for you. They allow you to avoid SEO devaluation from duplicate online content. Try it out, and if it’s not exactly right for your business, you’ll receive a refund no questions asked.
X-Spinner has been tested on Windows XP, Vista, Windows 7, Windows 2003/2008 and Windows 8, Windows 10 and MacBook with Windows VM; it's advisable to have a screen resolution larger than 1024x768px for optimal interface display due to the large amount of functionality. For using X-Spinner on Mac Computer, you need instal a windows virtual machine on your Mac computer.
Using Spinbot you can instantly spin (or rewrite) a chunk of textual content up to 10,000 characters in length (or about 1000 words), which is much longer than an average website or freely-distributed article. With a single click you can turn your old blog post or website article into a completely new one, thereby doubling the payoff you get in return for the time and energy you have already invested into creating quality website content. Spinbot is lightning fast as well as free, so there is potentially no limit to the amount of free web content that you can create using this tool.
People, I’m pretty sure over half of the articles you read nowadays come out from a spinner such as this one, and you can’t even tell the difference… believe me I know – I publish a lot of these articles myself, using Spin Rewriter, and they are very good and believable, you wouldn’t know the difference between one of them and an article written by a human.
Words have the uncanny ability to create magic. Often a group of words is rewritten to achieve various purposes. Either if you are a student, blogger, author or writing in any capacity; you need to play with your words to create magic for the reader. Rewriting is a very useful tool for a lot of people. The best way to rewrite something is to do it yourself and with your own knowledge. Often this is restricted by lack of time and vocabulary. It takes up to hours, days or even weeks to rewrite something depending upon the length of it. No matter how good you are in the language, there comes a point where your knowledge starts to drain out.