Uninstalling the Luna App
To uninstall apps on your Mac, open Finder > Applications, and select the app you wish to uninstall. To uninstall the app, simply move it to your Trash.
To uninstall apps on your iPad, tap and hold on the app icon you wish to uninstall. Select either the X button or the "Delete App" button in iPadOS 14.
Uninstall the Luna Retina Driver
In your Mac's top menu bar, click on Help > Uninstall Luna Retina Driver.