# Interval timer card

> Canonical HTML: https://screenrig.ai/docs/cards/timer/

A gym-grade interval timer anchored to a start time, so every screen counts the same rounds in step.

Category: Time. Tags: Countdowns and timers, Clocks and calendars.

## Previews

![Interval timer](/cards/timer/v1/screenshots/canvas-bloom.webp?sha=7eba6484bd9a2238dbd9df0a2795507cd684c15c59c881ad0ac88fea46bb26e8)

Canvas

![Interval timer](/cards/timer/v1/screenshots/corner-bloom.webp?sha=e3fd5aed11a47062108eee2b1155580c145db9d24d977292ee596605d275e70f)

Corner

![Interval timer](/cards/timer/v1/screenshots/chip-bloom.webp?sha=226b2f450d763ca3f89f1483ae60a3a583f1382bb4119ee9ed95f29faad1e0c8)

Chip

## Views and forms

Views: canvas, corner, chip. Canvas forms: landscape, portrait.

[Card views, themes and publishing](/docs/cards/). [Browse the gallery](/apps/#cards).

## Data and privacy

This card uses its configured properties and live card data.

## Properties

For theme, background, accent and position, see [Common properties](/docs/cards/#common-properties).

Set static properties in `params`. Bind `data` to a project card data key for live values; that document holds only dynamic properties. Without a data key, put the complete configuration in `params`. Nested rows describe the contents of their parent property.

### Static properties

| Name | Type | Default | Values and limits | Description |
| --- | --- | --- | --- | --- |
| `title` | string | `""` | maxLength: `40` |  |
| `work` | integer | `40` | minimum: `1`; maximum: `3600` |  |
| `rest` | integer | `20` | minimum: `0`; maximum: `3600` |  |
| `rounds` | integer | `8` | minimum: `1`; maximum: `99` |  |
| `warmup` | integer | `0` | minimum: `0`; maximum: `3600` |  |
| `cooldown` | integer | `0` | minimum: `0`; maximum: `3600` |  |
| `labels` | object |  | additionalProperties: `false` |  |
| `labels.work` | string | `"Work"` | maxLength: `16` |  |
| `labels.rest` | string | `"Rest"` | maxLength: `16` |  |
| `labels.warmup` | string | `"Warm up"` | maxLength: `16` |  |
| `labels.cooldown` | string | `"Cool down"` | maxLength: `16` |  |
| `loop` | boolean | `false` |  | Start again when the session ends. |
| `timeZone` | string, null | `null` |  |  |

### Dynamic properties

| Name | Type | Default | Values and limits | Description |
| --- | --- | --- | --- | --- |
| `startAt` | string |  | Required | ISO 8601 instant (or local time in the zone) the session starts. |

## Canvas example

Add this item to a playlist page’s `primitives`. [Publish the playlist and assign a screen](/docs/cards/#publish-a-card-canvas).

```json
{
  "id": "timer",
  "primitive": "card",
  "card": "timer",
  "major": 1,
  "params": {
    "theme": "neomustard"
  },
  "rect": {
    "x": 0,
    "y": 0,
    "width": 1920,
    "height": 1080
  },
  "layer": 0,
  "content_fit": "fill",
  "data": "timer-main"
}
```

## Write live data

Create this document before showing the card, then replace it to update the screen without republishing. Use the same project as the playlist. Supply your API authorization through the environment; see [API authentication](/docs/authentication/).

```console
curl --request PUT "https://api.screenrig.ai/api/card-data/timer-main" \
  --header "Authorization: Bearer $SCREENRIG_TOKEN" \
  --header "ScreenRig-Project: $SCREENRIG_PROJECT" \
  --header "Content-Type: application/json" \
  --data '{"document":{"startAt":"2026-10-15T12:00:00Z"}}'
```