Today, you can find many different self-studies on the vastness of the internet. From conservative academic publications to instagram blogs. Most often, self-studies serve as a supplement to traditional ways of learning a language, especially at advanced levels.
Smartphone apps
Lots of lectures on grammar topics for all levels. Exercises and tests for each section. All information is also organized in tables.
Interactive quiz with 25.000 words, grammar rules and tips, possibility to save words.
Language learning app for any level, structured lectures, quizzes, socializing.
Structured lectures of any level, interactive knowledge testing, individual selection of training program.
The most popular application for communicating with both language learners and people in the process of learning. Intuitive interface with chat, video call, error correction and translator functions.
Russian 
Ukrainian 
Georgian 
English 
Spanish 
Portuguese