> Portal Navigation:
> 
> - Append `.md` to any URL under `https://dev.wix.com/docs/` to get its markdown version.
> - Pages are either content pages (article or reference text) or menu pages (a list of links to child pages).
> - To get a menu page, truncate any URL to a parent path and append `.md` (e.g. `https://dev.wix.com/docs/sdk.md`, `https://dev.wix.com/docs/sdk/core-modules.md`).
> - Top-level index of all portals: https://dev.wix.com/docs/llms.txt
> - Full concatenated docs: https://dev.wix.com/docs/llms-full.txt

## Resource: About Custom Apps

## Article: About Custom Apps

## Article Link: https://dev.wix.com/docs/develop-websites-sdk/code-your-site/developer-environments/packages/custom-apps/about-custom-apps.md

## Article Content:

# About Custom Apps

Custom apps are applications you create using [Wix Blocks](https://dev.wix.com/docs/build-apps/develop-your-app/frameworks/wix-blocks/about-wix-blocks.md) to add reusable functionality across multiple Wix sites. Your custom apps are private and only you can install them on sites where you're a site collaborator. Once installed, all site collaborators can access the functionality of the custom app.

> **Note:** Custom apps replace Velo packages built by you. Now, instead of creating packages, functionality is managed as apps.

Using custom apps allows you to unify the following functionality across sites:

- Widgets
- Code
- [Dashboard extensions](https://dev.wix.com/docs/build-apps/develop-your-app/extensions/dashboard-extensions/about-dashboard-extensions.md)
- [Collections](https://dev.wix.com/docs/build-apps/develop-your-app/frameworks/wix-blocks/cms-collections-in-blocks/about-cms-collections-in-blocks.md)

For example, you might use custom apps to do the following across multiple sites:

- Ensure a standardized visual design.
- Centralize and reuse custom logic and code.
- Add and manage custom dashboard features.
- Use uniform data structures and content setups.

## Supported IDEs

You can use and access functionality from your custom apps using:

- The editor (Wix Studio and Wix Editor)
- The Wix IDE
- Your [local IDE](https://dev.wix.com/docs/develop-websites-sdk/code-your-site/developer-environments/ides/git-integration/about-git-integration-with-wix-cli.md)

> **Note:** You must have a Wix Studio account to create a Blocks app.

## Access custom app functionality on a site

Install and manage your custom apps, including the version installed on the site, under **Custom Apps** when you click **App Market** ![App Market](https://wixmp-833713b177cebf373f611808.wixmp.com/images/f9c6fd28cc45e166c6ad1fd35610353a.png) in the Editor.

Once installed, a custom app's functionality is automatically available on the site. To learn how to access the functionality, see [Install a Blocks App on a Site](https://dev.wix.com/docs/build-apps/develop-your-app/frameworks/wix-blocks/deploy-and-manage-blocks-apps/install-a-blocks-app-on-a-site.md#change-the-installed-app-version).

## See also

- [Install a Blocks app on a site](https://dev.wix.com/docs/build-apps/develop-your-app/frameworks/wix-blocks/deploy-and-manage-blocks-apps/install-a-blocks-app-on-a-site.md#change-the-installed-app-version)
- [About Wix Blocks](https://dev.wix.com/docs/build-apps/develop-your-app/frameworks/wix-blocks/about-wix-blocks.md)