Spaced-Repetition Review Scheduler
Enter when you first learned a word and see the SM-2 schedule of review dates that keeps it in memory — the same expanding intervals Anki uses.
Your review schedule
| Review | Interval | Day | Due date |
|---|---|---|---|
| #1 | +1 day | Day 1 | 2026-08-01 |
| #2 | +6 days | Day 7 | 2026-08-07 |
| #3 | +15 days | Day 22 | 2026-08-22 |
| #4 | +38 days | Day 60 | 2026-09-29 |
| #5 | +95 days | Day 155 | 2027-01-02 |
| #6 | +238 days | Day 393 | 2027-08-28 |
This projects an ideal SM-2 schedule assuming you recall each card successfully. Miss one and its interval resets — real apps adjust the ease as you go.
Revise less, remember more
Memory fades on a predictable curve, and the smartest time to review is right at the edge of forgetting. Spaced repetition rides that curve: each successful review pushes the next one further out, so a word you have truly learned barely costs you any time, while the shaky ones keep coming back until they stick.
Seeing the dates laid out makes the payoff obvious — a card reviewed on day 1, 7, and 22 has been all but cemented for the effort of three quick glances.
Frequently Asked Questions
What is spaced repetition?
It's a review technique that schedules each item just before you'd forget it: short gaps at first, then longer and longer as the memory strengthens. Reviewing on that expanding schedule locks vocabulary into long-term memory with far less total effort than cramming.
How are the intervals calculated?
This scheduler uses the classic SM-2 algorithm popularised by SuperMemo and Anki: the first review comes after 1 day, the second after 6, and every review after that multiplies the previous interval by an ease factor (2.5 by default). So a card you keep getting right is seen less and less often.
What does the ease factor do?
It controls how fast the intervals grow. A higher ease stretches the gaps quickly (fewer reviews, more risk of forgetting); a lower ease keeps reviews closer together (more reviews, safer recall). Real apps nudge the ease up or down based on how easily you answered.
What happens if I forget a card?
In a real spaced-repetition system a lapse resets the card to a short interval and lowers its ease, so it comes back sooner. This tool shows the ideal schedule assuming successful recall — use it to picture the rhythm, not to replace an app that tracks your actual answers.