Application Tekstovod. Quality for evaluating the text in Russian using the coefficients of naturalness and readability.
Such a check allows you to prepare text that is understandable to a potential audience and prevent keyword spam.
The application uses factors such as Fog Index (Gunning Nebula Index), Flash Index, naturalness of the text according to Zipf, academic and classical nausea.
It will be useful to everyone who creates and orders high-quality texts for people.