The Blender add-on is the local bridge between the Android client and the open Blender scene. Install the official ZIP directly in Blender, then wait for the first-run dependency check to finish.
On the first run, the add-on can show Installing Dependencies with progress and the current module. This prepares optional streaming and crop tools.
The add-on server bridge is the connection used by the Android app. Streaming has additional optional dependencies and can become available after installation finishes.
The Camera Controller sidebar should show its logo, Control Mode selector, and a Server Stopped section. If it does not, see Add-on Installation Troubleshooting.
Choose a control mode and follow Start the Blender Server Bridge.