Go to the "Your VPS 2.0 server" page of your Members Area. Here you can find all necessary information for a VPS connection via iPhone/iPad.
Install Microsoft Remote Desktop or any other free application that supports Network Level Authentication (NLA) on your iPhone/iPad from AppStore. Further instructions are for connecting through Microsoft Remote Desktop.
Run the application on your smartphone and click "+", in the top right corner of the screen to create a new connection.
Choose “Add PC” in the next menu.
Enter the information for RDP connection in the “PC Name” field. The information can be found on the “Your VPS 2.0 server” page of your Members Area.
To connect to your VPS server, choose the connection you created in the application.
In the next window, enter your login and password.
You VPS server is ready for work!