Qliksense by default subscribes to the 'build-once-use-on-any-device' method. You don't need to follow any specific technical steps to create a mobile-specific application.
Create your qvf, publish to the hub. A user logging-in via desktop will see the views arranged differently from a user logging-in via mobile.
You could try using the Responsive Design Mode in Firefox and Chrome during development to ensure your design looks good on different devices.