Roller is an Android application developed by RayhonSoft. It falls under the Education & Reference category and offers a variety of features for learning English. The app includes a grammar section that covers all the parts of speech, verb tenses, and rules of agreement. Users can also take tests to practice their English skills and learn 8,000 important English words. The app features an English-Russian and Russian-English dictionary with pronunciations and a phrasebook. Additionally, the app provides topics with translations and reading exercises for English texts.

Roller aims to provide a clear and quality learning plan for users worldwide. The app offers a variety of lessons that make learning English an interesting and engaging game, with gamification elements that award bonus points for completed exercises. The app has been downloaded over 100,000 times and has received positive feedback from users. Roller is a great tool for anyone looking to learn English, from students to professionals, and is available for free on the Google Play Store.