A free app for Android, by StudyCards.

This application is a full-fledged course in the Russian language. It contains a lot of material: lessons, vocabulary, grammar, and phrases. The material is presented in the form of flashcards, which are the best method for memorizing a large amount of information. Three unique modes are available in this program to improve your learning. The first is the Free mode, which gives you complete freedom to easily flip through the cards. The second option, Passing, uses straightforward tasks to help you consolidate your information after each card. Last but not least, the Outline mode condenses and arranges all the information so that you can easily understand it. Your learning journey will be productive and efficient with this app!