Go to the "Your VPS 2.0 server" page of your Members Area. You can find all the information you need to connect for a VPS connection via iPhone/iPad there.
Go to the AppStore, find Microsoft Remote Desktop or any other free application that supports Network Level Authentication (NLA), and install it on your iPhone/iPad. This instruction is for connecting through Microsoft Remote Desktop.
Open the installed app on your smartphone or tablet and click "+" to start creating your new connection to the VPS-server.
Choose “Add PC” in the next menu.
Fill the “PC Name” field with the information for the RDP connection. You can find it on the “Your VPS 2.0 server” page of your Members Area.
Choose the connection you've just created in the application and you will connect to your VPS server in no time.
Enter your login and password. It can be found on the ”Your VPS 2.0 server” page of your Members Area.
You VPS server is ready for work!