Правила русского языка APP
This set of rules for the Russian language is intended to serve as the main source for compilers of textbooks, dictionaries of the Russian language, special dictionaries, encyclopedias and reference books, and is also a necessary practical guide for everyone who is interested in the issues of Russian spelling.
In the application, all the rules are neatly and clearly designed, there is a quick search, and all functions work without an Internet connection.