Presently, The tool includes words from the famous Barron's book using which you can prepare for GRE and other similiar exams. Using this tool, you can memorize english words more efficiently and faster. It features to mark the word as New, Mastered or Gray. You can mark a word as new, if the word is very new to you and that as Gray, if the word is fimiliar but not yet mastered or you can mark them as mastered, if the word is very common to you.