# Understanding FSRS and Scheduling Settings

How review scheduling settings affect Learn Mode.

URL: https://www.memo.cards/help/settings/understanding-fsrs-and-scheduling-settings
Updated: 2026-09-21T00:00:00+08:00

Memo uses scheduling settings to decide when flashcards should come back for review. Advanced users can adjust FSRS-related values from **Settings → Configuration → Scheduling**.

## What FSRS is

FSRS is a spaced-repetition scheduling system. Its goal is to show cards again at useful intervals so you review before forgetting, without reviewing everything too often.

## Settings you may see

- **Request retention**: how strongly Memo should aim to keep cards remembered. Higher retention usually means more frequent reviews.

- **Maximum interval**: the longest allowed gap before a card can be scheduled again.

- **Learning steps**: short early review steps for new cards.

- **Relearning steps**: short steps used after you forget a card.

- **Fuzz**: adds slight variation so reviews are not scheduled too mechanically.

## Should I change these?

Most users can keep the defaults. Change scheduling settings only if you understand the tradeoff between review load and retention.

## Reset to defaults

If your review schedule starts to feel too aggressive or too light, use the reset option in scheduling settings to return to Memo's defaults.

## Important notes

- Scheduling settings affect review behavior, not how flashcards are generated.

- Changing settings does not rewrite the content of existing flashcards.

- Learn Mode and Cram serve different purposes: Learn follows scheduled review, while Cram is a faster extra review session.