Citadel OS includes an Umbrel OS compatibility mode. This allows you to run any Umbrel app in an isolated environment on Citadel OS. We try to be as strict as possible with permissions to prevent malicious apps from accessing your node, however, any app in Umbrel compatibility mode will have access to your Lightning node.
We’re currently working on an easy way for Umbrel OS users to upgrade to Citadel OS. This feature is launching soon, and we’ll post updates on our blog.