Spaced repetition, explained simply (and why it works)

If you've ever crammed for an exam and forgotten everything a week later, you've met the forgetting curve. Spaced repetition is the proven antidote, and it's the engine quietly running inside GyanGram.

The forgetting curve

Over a century ago, psychologist Hermann Ebbinghaus showed that we forget new information rapidly at first, then more slowly over time. Learn something today, and within days most of it is gone, unless you do something about it.

The fix: review at the right moment

Here's the key insight: each time you successfully recall something just as you're about to forget it, the memory gets stronger and fades more slowly next time. So instead of reviewing everything every day (exhausting) or never (useless), you review each item at expanding intervals, say 1 day, then 3, then 7, then 16, and so on.

That's spaced repetition: the right review, at the right time, with minimum wasted effort.

What the SM-2 algorithm does

GyanGram's revision engine is built on the same principle popularised by the SM-2 algorithm family. After you read a card, you rate how well you knew it, Hard, Medium or Easy. Based on that rating, the schedule decides when to show it again:

• Hard → comes back soon (you need more reps).
• Medium → a moderate interval.
• Easy → pushed far into the future (you've got it).

Over time, the cards you struggle with appear often, while the ones you've mastered barely show up. Your study time flows automatically to where it's needed most.

Why it beats re-reading

Re-reading feels productive but mostly builds false confidence. Active recall, forcing your brain to retrieve the answer, is far more effective, and spacing those retrievals multiplies the benefit. GyanGram combines both: every card review is an act of recall, scheduled at the optimal moment.

Study less. Remember more. That's the whole promise of spaced repetition.

How to make the most of it in GyanGram

• Rate honestly. The schedule is only as good as your ratings.
• Clear your "due" cards daily. The due badge tells you exactly what's ready for review.
• Keep sessions short and frequent. Ten focused minutes a day beats a two-hour weekend binge.
• Use Revision Mode to focus only on what's due today.

Do this consistently and you'll feel the difference within a couple of weeks, facts that used to slip away will simply stay put.