> For AI agents: the complete documentation index is available at https://docs.flashnerd.com/llms.txt, the full documentation bundle is available at https://docs.flashnerd.com/llms-full.txt.

# Start spaced repetition

Use an **SRS set** when you want Flashnerd to decide when to show a card again. Your answers update each card's schedule. Use the practice modes in **Home** when you want an unscheduled session instead.

## How spaced repetition works

Spaced repetition spreads reviews over time. Recall can fade between reviews; revisiting a card helps reinforce what you learned. As you recall it successfully, you can often wait longer before the next review.

Flashnerd uses **FSRS** to update each card's schedule from its review history, your answer grade, and the set's settings. Try to recall the answer, reveal it, then grade honestly. If you forget, choose **Again**; the card can return sooner through relearning steps. Actual intervals vary and do not always increase.

<figure>
  <img width="760" height="560" loading="eager" decoding="async" className="srs-memory-illustration" src="https://docs.flashnerd.com/illustrations/spaced-repetition.svg" alt="Illustrative memory retention from 60 to 100 percent over seven days: first learned on day 0, then reviewed on days 1, 3, and 6. Mint curves rise with reviews; gray continuations decline without another review." />
  <figcaption>Illustrative days and percentages. Mint curves show spaced reviews; gray continuations show decline without another review. Actual timing and recall vary by card.</figcaption>
</figure>

See [Answer grades](https://docs.flashnerd.com/guide/srs/reviewing.md#start-and-answer) and [Scheduling settings](https://docs.flashnerd.com/reference/srs/scheduling.md).

## Before you begin

Sign in and create a deck containing a few cards. If you have not done that yet, follow [Your first study session](https://docs.flashnerd.com/guide/getting-started/getting-started.md).

## Decks and SRS sets

| Item           | What it contains                                                                                                |
| -------------- | --------------------------------------------------------------------------------------------------------------- |
| **Deck**       | The cards, their content, and their template. Find it in Home.                                                  |
| **SRS set**    | Links to one or more decks, their spaced-repetition schedules, and settings for reviewing them. Find it in SRS. |
| **SRS folder** | A way to organize sets and review a group of sets together.                                                     |

Linking a deck does not create a separate copy of its cards. Editing a linked card changes the same card you see in Home. **A deck can belong to only one SRS set.**

For example, put your _Travel vocabulary_ and _Useful sentences_ decks in a _Travel practice_ set. They retain their individual card templates but use the set's SRS settings.

## Create a set

1. Open **SRS** and tap the add button.
2. Choose **Create Set**.
3. In **Set Info (1/2)**, enter a **Set Name**.
4. Choose a **Parent Set Folder**, or leave **None** selected to place the set at the top level, **SRS Home**.
5. Choose **SRS Settings**. Start with **Default** unless you already have a preset you want to use.
6. Tap **Next**.
7. In **Deck Info (2/2)**, tap **Add Deck**, select your decks, and confirm the selection. Folders help you find decks; only the decks are linked.
8. Review the selected deck list and tap **Create SRS Set**.

The new set appears in SRS. Open it to see its decks and cards, then tap **Start SRS Review**.

<figure>
  <img width="1206" height="2622" loading="eager" decoding="async" className="app-screenshot" src="https://docs.flashnerd.com/screenshots/srs-set.png" alt="Docs Demo SRS set containing the Everyday facts deck with six New cards remaining today" />
  <figcaption>The set links your saved deck and shows the cards available for scheduled study today.</figcaption>
</figure>

:::tip A deck is unavailable for selection
It may already be assigned to another set. Use the existing set's linked-deck move action to transfer it while retaining progress. Unlinking instead removes its associated SRS statistics. Read [Manage sets and linked decks](https://docs.flashnerd.com/guide/srs/manage-sets.md) before changing membership.
:::

## Understand Remaining Today

**Remaining Today** reflects cards currently available under the set's schedule and daily limits. It is not the total number of cards you own. A large deck can have a small remaining count because cards are due later, new-card limits have been reached, or some cards are disabled.

The default settings introduce up to **15 new cards per study day**, allow **150 daily review admissions**, and include **0 suspended cards**. Existing presets or imported settings may use different values. See [Daily limits](https://docs.flashnerd.com/reference/srs/daily-limits.md).

## Your first review

Try to recall the answer before tapping **Show Answer**. Then choose the grade that describes your recall. Flashnerd records the answer and schedules the card again; a short learning step can bring it back within the same session.

Continue with [Review a set or folder](https://docs.flashnerd.com/guide/srs/reviewing.md) for answer buttons, undo, and session completion.