Repete provides the frequency list of 6500 most common Russian words. Training consists of listening of russian words and a removing the already well remembered words from the list. You schould by oneself to select the quantity of words in a lesson.
Speed of change of words also is made by oneself. The removing of a word from the list can be made during listening (press the button "unvisible"), that allows to select for listening only necessary for you words. Training get automatically, in a background mode.