The App allows to access the Vis of your ioBroker installation. You can access the local instance or an external accessible. Please use LetsEncrypt https and a strong password for authentication.
Access via ioBroker.pro cloud and VPN is as well possible. If a user and password is provided the app will do an autologin.

The connection order if url or username is provided:
Local -> Cloud -> External -> VPN

You can swipe down at everytime to reload the view and switch the connection way.