# Support added for app-owned metafields — Shopify developer changelog
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## Support added for app-owned metafields

In the `2025-04` API versions of Checkout and Customer Account UI extension APIs, we've enhanced the `appMetafield` API to support reading app owned metafields. These metafields give you greater control over your application's data, as your app manages both the data and its visibility.

To read app-owned metafields, you must request them in your extension configuration `toml` file using the `$app` format in the namespace. This configuration makes app-owned metafields accessible through the `appMetafield` API in your UI extension code. Note that while you can read these metafields, writing to them is not permitted.

Currently, app-owned metafields are available in the `unstable` version and will be included in stable versions starting from `2025-04`.

For more details, please refer to the metafield configuration guide for the [Checkout UI extensions API](https://shopify.dev/docs/api/checkout-ui-extensions/unstable/apis/metafields) or the [Customer Account UI extensions API](https://shopify.dev/docs/api/customer-account-ui-extensions/unstable/configuration#metafields).

*Published: February 07, 2025*
Tags: API, New
Link: https://shopify.dev/changelog/support-added-for-app-owned-metafields-in-checkout-ui-extension-api

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