Never done it myself, but you are able to run an app 'on premise' from your own hardware. See for example: https://docs.mendix.com/deployment/on-premises/deploy-mendix-on-microsoft-windows
However without a Mendix license the app will only run for 2 hours at a time just as the Mendix sandbox.
The only thing I can think of is by creating an app of your application. But then you can only show it on a tablet or phone and not on a desktop.