Is Bonita Portal really responsive?

Hi all,

We created a first bonita application for our company and this application should be used by mobile users.
Of course, we may see our application on both iOS and Android but the design of the portal do not adapt itself to the screen size and orientation.

Is there something that needs to be configured to enable the responsive mode?
Should I use an other URL or an additive parameter to make it work?
Is the responsive portal limited to the souscription?