What is the PDF Reader & Viewer application, how does it work?

According to the introduction of Android Tools (ru), PDF Reader & Viewer is a Tools app on the Android platform. There is currently a 1.0.74 version released on Mar 26, 2020, you can see the details below.

The popularity of pdf format is growing by leaps and bounds. This is due to its ease of use and extreme compactness, as well as the fact that this format has recently become the base for electronic document management in our country. Today, most e-books, scans of important papers and even technical documentation are created in pdf format. Pdf reading room is actively used for work, in the process of a hobby and recreation. However, before such files were opened only from a computer ... The application "PDF reader for reading in Russian" offers its users the function of reading files directly from the screen of your smartphone! Do I need to explain the undoubted advantages of this application?
- A significant saving of time and effort (no need to frantically search for a stationary computer);
- your documents are always at hand (the modern person seems to be sleeping next to the phone!);
- and all files in one place! (pdf reader automatically opens found docks);
In earlier versions, almost all readers, and pdf readers for android in particular, were written in English (international) language. But demand creates supply, and we bother to create the best pdf reader. With our application, you can easily read more than a dozen interesting books, keep a copy of the contract intact, because PDF for reading is the best solution.