Learn it once.
Remember it for good.
Reading a doc once doesn't make it stick. Gnoseed turns practical concepts into flashcards and uses spaced repetition to resurface them exactly when you're about to forget — so the knowledge lasts.
Four steps, repeated until it sticks
No setup, no syllabus. You answer, the algorithm schedules, you come back. That's the whole loop.
Pick a category & quiz
Choose from 21 developer decks — Kubernetes, Terraform, AI & LLMs and more — each holding focused quizzes you can drill on their own.
Answer practical questions
Real, job-relevant multiple-choice questions written by a developer. No trivia, just what matters in practice.
Get rated automatically
No self-assessment. Your answer's correctness and response time set the card quality for you.
Review at the right time
Spaced repetition brings each card back just before you forget it — and your knowledge garden grows.
Beat the forgetting curve
Without review, memory of a new concept decays fast — most of it gone within days. Each time you successfully recall a card, the memory resets stronger and decays slower.
Gnoseed times each review to land just before you'd forget. Fewer reviews, longer retention, no cramming.
- Reviews scheduled right before you forget
- Cards you struggle with come back sooner
- Less time studying, more retained long-term
Memory retention over time
Two proven scheduling engines
Pick the spaced-repetition algorithm that fits your style — switch anytime, your progress carries over.
SM-2
DefaultThe classic SuperMemo algorithm. A simple, quality-based formula for interval spacing — cards you know are shown less often, cards you struggle with come back sooner. Reliable, battle-tested, and easy to understand.
- ✓ Simple ease-factor per card
- ✓ Fixed interval formula
- ✓ Predictable scheduling
- ✓ Great for getting started
FSRS
Research-backedFree Spaced Repetition Scheduler — a modern model of your memory stability and difficulty per card. Adapts more precisely to your learning patterns over time, optimizing for long-term retention with fewer reviews.
- ✓ Models memory stability & difficulty
- ✓ Adaptive interval optimization
- ✓ Fewer reviews, better retention
- ✓ Research-backed (2022+)
Everything you need to learn effectively
Built for developers who want to retain knowledge, not just read it once.
Learning Algorithms
Choose between SM-2 and FSRS — two proven spaced repetition algorithms that adapt to your memory patterns for optimal retention.
Progress Tracking
Track your mastery level, daily streaks, and cards due across all topics at a glance.
Auto Quality Rating
No self-assessment needed. Your answer correctness and response time determine the next review interval.
Synced Across Devices
Start instantly — fully offline, saved in your browser, no signup needed. Sign in with Google or email to sync your progress, streak and settings across every device.
Multiple Topics
Study Kubernetes, Go, and more — each topic with its own progress tracking and card deck.
Dark Mode
Easy on the eyes. Switch between light and dark themes with a single click.
Frequently asked
Do I need an account to start?
No. Gnoseed runs fully offline in your browser — start a session instantly. Sign in only if you want to sync progress, streaks and settings across devices.
How do you decide when a card comes back?
Your chosen algorithm (SM-2 or FSRS) schedules every card. Answer it correctly and the interval grows; miss it and the card returns sooner. Cards that are due resurface on your dashboard.
What's the difference between SM-2 and FSRS?
SM-2 is a simple, predictable interval formula. FSRS models your memory stability and difficulty per card for fewer reviews and better long-term retention. You can switch anytime in Settings — your streak and review count carry over.
Where do the questions come from?
Every deck is written by a developer — practical, job-relevant multiple-choice questions, not trivia. New topics land regularly.
Is it really free?
Yes. No account, no credit card, no ads. Your data stays in your browser unless you choose to sign in and sync.
Ready to make it stick?
Pick a category and start your first session right away. No registration, no credit card.
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