Studying

Cardagain uses the SM-2 algorithm (same as Anki) to schedule your reviews. The goal is to review a card right when you’re about to forget it — not too early (wastes time) and not too late (you’ve already forgotten).

Study session flow

Select deck from the Deck Select screen
Study screen shows the front of the first due card
Press A to flip and reveal the answer
Rate yourself with A/B/X/Y
Next card appears automatically
Session ends when all due cards are reviewed

Rating guide

Button	Rating	Meaning	When to use
A	Again	Complete failure	You couldn’t recall the answer at all
X	Hard	Difficult recall	You got it but struggled; felt unsure
B	Good	Solid recall	You got it with normal effort (default)
Y	Easy	Instant recall	You knew it immediately; almost too easy

How SM-2 schedules cards

The algorithm tracks each card’s easiness factor (EF), interval, and repetition count:

Again: Resets the card to 1-minute review
Hard: Increases interval slightly, lowers EF
Good: Standard interval increase (EF × current interval)
Easy: Larger interval increase, raises EF

New cards start with a 1-day interval, then 6 days if you get them right twice. From there, intervals grow multiplicatively based on your EF.

Session tips

Study daily if possible — consistency beats intensity
Be honest with ratings — the algorithm only works with accurate data
It’s okay to fail — “Again” is the most important button for learning
Stop when tired — come back later; fatigue hurts retention

What “due” means

A card is “due” when its scheduled review date has passed. The app shows:

Japanese - 3/15

Meaning you’ve reviewed 3 of 15 due cards in this session.

New cards vs reviews

New cards (never studied) are shown first
Due reviews are sorted by overdue date
Learning cards (recently failed) are mixed in appropriately

Data persistence

All reviews are saved to data.json immediately. If the app crashes or you quit mid-session, your progress up to the last completed card is preserved.

Keyboard shortcuts

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