Online Tool Store
Spaced Repetition Trainer
A simple spaced-repetition flashcard trainer — add cards, rate your recall, and let due dates schedule themselves. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
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Saved in your browser's local storage — nothing is uploaded.
How it works
- Add flashcards with a front (question) and back (answer).
- Flip each due card and rate how well you remembered it.
- Cards you know well are scheduled further out; ones you forget come back sooner.
The formula
Again: next interval = 1 day
Hard: next interval = current interval × 1.3
Good: next interval = current interval × 2.2
FAQ
What is spaced repetition?
A learning technique where you review a card again just as you're about to forget it — remembered cards get pushed further into the future, while forgotten ones come back sooner, so your study time focuses on what you actually need to practice.
How does the interval grow?
"Again" resets a card back to a 1-day interval. "Hard" grows the interval modestly (×1.3). "Good" grows it more (×2.2) — a simplified version of the algorithm used by tools like Anki, without the full ease-factor tuning.
Where is my deck saved?
In your browser's local storage, on your device only — it persists between visits on the same browser but isn't backed up or synced anywhere.
Is my deck uploaded anywhere?
No — everything runs entirely in your browser. Nothing is sent to a server.
How we compare
| Feature | Online Tool Store | Paper flashcards | Full flashcard apps |
|---|---|---|---|
| Automatic scheduling | ✓ | Manual sorting into piles | ✓ |
| No account or install | ✓ | ✓ | Usually requires sign-up |
For quick study sessions without installing a dedicated app, this gets the core spaced repetition benefit without the setup.