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.
Does your website need quality content in numbers? The truth is; producing articles restrict the amount of content that is written on your site if you’re the only one writing on your website and can take any author hours. Hiring a writer can get expensive. Have you ever considered using an article spinner? Spinning content is a excellent way to keep your website fresh and relevant . Needless to say, not all article spinner applications is great. Therefore it’s important to do your homework first. We propose Spin Rewriter 9.0. You can rewrite your articles using their Rewrite system. In addition, you have a Bulk Rewrite option that lets your rewrite articles with one click. You break it up into several terrific pieces of content and may take one article. The choices are endless.
If you already have some blog or website content that you want to turn into fresh, rewritten content in a matter of seconds you should use our article rewriter tool. This free paraphrasing tool is available to you 24/7 to rewrite the text. Most of the text created by our article spinner is human readable and 100% unique which makes it suitable for creating mass blog posts and web content.

Spin Rewriter 5.0 technology was a previous edition that allowed their clients to use the basic article rewriting system.  Their newer versions over the years have just kept getting better and better.   The new Spin Rewriter 9.0 technology gives you the option of assigning variables to your content.  Their software is dead easy to use.  In just three steps you can have up to 50 uniquely spun articles.

I think it is better to just come up with your own content. Most of those type of programs that are designed to make things easier, really just make things more difficult. You are right. The more you write, the more practice you get, and the better you’ll become. I have been writing for years myself, and I have never needed any content generation programs.

Mastering an online article rewriter tool can prove quite tricky. When paraphrasing or rewriting any text or paragraph, many writers and students tend to get hold of the technology that enables them to rewriter any written piece of content into a fresh piece, yet keeping the original meaning of the text same. This approach is usually used to simplify a piece of writing, minimize the use of quotes or target an alternative audience. When article spinner tool is used correctly, paraphrasing turns out to be much more concise than the original text, covering all the main points while preventing the risk of plagiarism. Whether you are a student or writer, you can use this free article rewriter online to rewrite any text to save time and get a different version.
This will no doubt seem very obvious to many people and for others it will send a shudder of fear down their spine! But if you want to make money online, be an affiliate marketer or a well known blogger, then there really is only one way to do it. The best way to get ranked and make money online is to do must things manually. Sure, there are legit shortcuts and additional tools that can make the process faster. But in general if you are looking to create content for your website, then you need to learn the correct way of doing it.
For this purpose, humans have created numerous rewriting tools to save time and use all words available in the English dictionary. Rewriting tools use millions of synonyms made available to them through artificial intelligence and instructions given by the human mind. If you hire the services of a content writer to rewrite/create content for you, they will charge you a lot. Big organizations can afford this but small startups and students can never afford the services of professional writers.    
This time, WordAI calculates the spin it generated at 97% uniqueness which is basically completely unique. If you look at the text above, again, the first sentence of the quoted content is a bit confusing, but the rest is still good. I would even say that the last sentence came out better than the previous spin, but generally, yes, the above spin looks more like a human wrote it.
Readable And Unique Content – the recommended settings for this one are the same as for the one above with the only difference being the change of the 1st input to “Readable”. This will create more unique versions of your content while still keeping a high level of readability. Generally, this is the best setting as it gets a good balance between human readability and uniqueness of the content generated.