Vocabulator application forms bilingual cards on the basis of the most common words in the book or subtitles, previously removing the basic vocabulary of the language. The application can work with the formats srt, ssa, fb2, txt, epub.Words are translated using the app dictionaries and the service API Yandex.Translate. Top words are selected for cards in a subtitle/book file without proper names. Word amount can be changed in the application settings.