Русский ЕГЭ 2021 (ударения, теория, словари) is a free Android application developed by tcaiyProd. It falls under the Education & Reference category and offers a comprehensive preparation guide for the Russian language exam.

The app features a theory section that covers all test items to help students in their preparation. Additionally, it includes an orthoepic dictionary, a dictionary of paronyms, and a dictionary of terms to help students verify and consolidate their vocabulary. The app also offers a challenge game that focuses on stress selection. Students can choose the correct stress for a given word and become stronger in their understanding of it.

It is worth noting that the developer is not a compiler or a teacher of the exam. Instead, they created the app as a solution to the problem of training materials being scattered across different sites. The developer aimed to collect everything necessary for exam preparation in one application with an interesting design. The app's colorful interface adds an element of fun to the otherwise boring exam preparation process.

Overall, Русский ЕГЭ 2021 (ударения, теория, словари) is a useful and engaging app for students preparing for the Russian language exam.