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    With its uniquely effective word learning system, the app helps you master words through a fun and addictive game. And it’s powered by the world's smartest, fastest dictionary. From the makers of the award-winning website, this app will expand your vocabulary with lightning speed!

    IT’S A SCIENCE... is a comprehensive program for lifelong learning of vocabulary, in which each activity is specially chosen for you.

    • We use sophisticated algorithms to help you learn more effectively.
    • We start with 120,000 questions that teach 12,000 words.
    • We use the science of learning to model how you learn (and retain) new words.
    • By comparing your answers to the hundreds of millions of answers given by other users, we personalize your learning experience and choose the best question for you at just the right time.

    ...AND IT’S A GAME
    We’ve turned learning vocabulary into an addictive game. You may not even notice that you’re learning along the way.

    • Accumulate points, achievements and badges.
    • Compete with users from throughout the world.

    Studying for an exam like the SAT, GRE, or TOEFL? We have learnable lists for you, covering everything from standardized tests to breaking news — you name it.

    • Choose from one of our 50,000 ready-to-learn lists.
    • Or if you see a word in the dictionary that you want to learn, just click "learn this word" and we'll teach it to you.

    Don't have a specific word or list in mind? Let our adaptive learning system find the right word for you.

    • Just play a few questions, and we'll pinpoint the words that are appropriate for your level.
    • We won't waste your time on words that are too easy or too hard.

    Like a good coach, won’t give up on you. Whether you pick the words or let us find them for you, we’ll work with you until you've mastered them.

    And even after you've achieved mastery, we'll continue to reinforce what you have learned to make sure that it all stays fresh in your memory. Next thing you know, you’ll be expanding your vocabulary and improving your communication, a key to success in school and business.

    Our dictionary was written for humans, by humans. Look up a word, and you’ll read a friendly explanation that you'll actually remember. It’s as if your favorite teacher were explaining it to you.

    We include clever usage tips and thousands of real-world example sentences that'll show you how words live in the wild and will make you more confident about using them yourself.

    See a word you’d like to know better? Tap "Learn this Word" and easily add it to your learning program.

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