Add Vocabulary, Organize it, Master it.

Learn Languages Faster with Customizable AI Flashcards

How it works

What is Noos?

If you've ever frozen mid-sentence in another language because the word you needed just wasn't there, you already know why Noos exists. It's a flashcard app built to close the gap between what you want to say and the vocabulary you actually have on hand. Every flashcard can carry phonetics, real examples and conjugation tables, added in one click instead of typed out by hand.

Because building a card takes seconds instead of minutes, that time goes back into actually learning the language. Less formatting, more fluency: your vocabulary grows, not your admin.

Powered by the FSRS spaced repetition algorithm, Noos learns your personal memory curve and times each review right before you'd otherwise forget, so retention lasts.

How it works

  1. 1

    Create a stack

    Click on the "Create a stack" button. Give your stack a name and description, add your target language. Done! You are ready to add up your vocabulary!

  2. 2

    Create your flashcards

    Once your stack is created, you can seamlessly add built-in blocks such as synonym, slang or case blocks to create the perfect flashcard. The best part? You do not even fill blocks yourself. Our AI does the heavy lifting!

  3. 3

    Review your flashcards

    2 modes: Standard or Intelligent. Use standard mode to review your stack regardless of whether you already know your flashcards or not. Use intelligent mode to review your stack with our advanced FSRS algorithm to optimize long-term retention.

  4. 4

    Track your progress

    Your dashboard shows your review streaks and memory retention across all your stacks. Manage your knowledge and increase it on a daily basis.

  5. 5

    Share and explore

    Every Stack created can be made available for the community. You can also explore stacks from other Noos users and import them directly into your library.

Under the hood

Powered by FSRS Algorithm

FSRS (Free Spaced Repetition Scheduler) is a state-of-the-art open-source algorithm developed from decades of memory research. Unlike older systems that rely on population averages, FSRS models your individual memory curve.

This means the schedule adapts to you: how fast you forget, how quickly you recover, and how well certain types of cards stick. The result is fewer wasted reviews and deeper, more reliable retention.

Who uses Noos?

Students

Last minutes before an exam? No worries, Noos has your back! A quick review will make you serene and ready to pass your exam with flying colours.

Language enthusiasts

It does not matter if you are a casual language learner or a future polyglot, Noos is the perfect tool to help you master new vocabulary.

Professionals

Learning a language to pursue a career abroad? Build solid custom vocabulary stacks that suit your needs and boost your professional growth.

Lifelong learners

Whether you are learning a language for increasing your career opportunities or just for fun, Noos will help you store and retain all your new vocabulary.

Common questions

Do I need an account to try Noos?

Yes, you need to create an account to create, store, learn vocabulary. The Free plan is all you need.

How many cards should I review each day?

Noos adapts to your pace. Even 5–10 minutes a day is enough to make meaningful progress. The algorithm ensures you only see the cards that matter most on any given day.

Can I use Noos for any language?

Noos currently supports 21 languages. The list is growing rapidly, so stay tuned!

Is Noos free?

Yes! Every feature is free right now, with no card and no trial period. Paid plans will come later.