You have all probably heard about Grammarly. It is an essential
tool for writing content. One big drawback, doesn't have an API. Well
this is where Perfect Tense comes in. They are almost as good as
Grammarly, but they do support API integration.
think this is the perfect tool to combine when using spinners, because
it can improve the article after it has been processed with a spinner.
SpinRewriter for example has built in integration with it on their
online tool and it works great.
Should help improving the article by a lot when producing bulk articles.