> ## Documentation Index
> Fetch the complete documentation index at: https://developer.upsun.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Set up multiple apps in a single project

> Create multiple apps within a single project, such as a CMS backend connected to a frontend to display it.

You can create multiple apps within a single project so they can share data.
This can be useful if you have several apps that are closely related,
such as a backend-only CMS and a frontend system for content delivery and display.

No matter how many apps you have in one project, they're all served by a single [router for the project](https://developer.upsun.com/docs/configure-apps/multi-app/routes.md).
To allow your apps to communicate with each other, [create relationships](https://developer.upsun.com/docs/configure-apps/multi-app/relationships.md).
Each app separately defines its relationships to [services](https://developer.upsun.com/docs/add-services),
so apps can share services or have their own.


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