About Custom Apps
Custom apps are applications you create using Wix Blocks 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
- Collections
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
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 
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.