The problem with traditional studying
Most students re-read notes, highlight textbooks, and cram the night before an exam. These methods feel productive, but research shows they produce shallow, short-lived memory. Within a week, up to 70% of what you studied fades away.
The culprit is a lack of active recall and optimal timing. You need to retrieve information at the exact moment your brain is about to forget it — right before the memory decays. This is called the spacing effect, and it's one of the most well-documented phenomena in cognitive psychology.
Spaced repetition: the science of long-term memory
Spaced repetition is a learning technique that schedules reviews at increasing intervals based on how well you remember each piece of information. The harder a card is for you, the sooner it comes back. The easier it is, the longer the gap before the next review.
Noos is powered by FSRS (Free Spaced Repetition Scheduler), the most advanced open-source algorithm for spaced repetition today. FSRS models your individual memory — not just averages — giving you smarter, more personalized review schedules than any other app.
AI that does the heavy lifting
AI card generation
Generate complete decks from any topic or text in seconds using Gemini AI. High-quality, recall-optimized cards without the manual work.
FSRS algorithm
The most advanced open-source spaced repetition scheduler, modeling your individual memory curve for maximum efficiency.
Rich card content
Supports text, code blocks, images, and more. Build cards as detailed or as minimal as you need.
Community stacks
Browse and study decks shared by other learners. Import them directly into your library with one click.
Who uses Noos?
Students
Ace exams by truly understanding and retaining course material, not just cramming the night before.
Language learners
Build vocabulary and grammar in any language with AI-generated cards tailored to your level and native language.
Professionals
Keep certifications, technical knowledge, and domain expertise sharp without wasting time on what you already know.
Lifelong learners
Turn books, podcasts, and articles into lasting knowledge. Study what interests you, at your own pace.