# Heroku ## Heroku **Status:**  **type:** `heroku` **Description:** [Heroku dyno metadata](https://devcenter.heroku.com/articles/dyno-metadata) **Other Attributes:** > :warning: This entity definition contains attributes without a role. > Stable Entities MUST NOT have attributes without a defined role. | Attribute | Type | Description | Examples | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability | |---|---|---|---|---|---| | [`heroku.app.id`](/docs/registry/attributes/heroku.md) | string | Unique identifier for the application | `2daa2797-e42b-4624-9322-ec3f968df4da` | `Opt-In` |  | | [`heroku.release.commit`](/docs/registry/attributes/heroku.md) | string | Commit hash for the current release | `e6134959463efd8966b20e75b913cafe3f5ec` | `Opt-In` |  | | [`heroku.release.creation_timestamp`](/docs/registry/attributes/heroku.md) | string | Time and date the release was created | `2022-10-23T18:00:42Z` | `Opt-In` |  |