On an iPhone, RDP is a rescue tool more than a workstation: you reach a Windows server for a few minutes, check a service, restart it, and go back to a computer. The screen is the constraint, so SSHive works on aiming. The trackpad mode, the default, gives you a cursor you move with small swipes and that clicks only when you tap without moving, so resting a finger never clicks by accident; hold still for a moment and the next movement drags a window. Pinch to zoom on a dense dialog, drag with two fingers to move around.
The case it serves best is an incident at the wrong moment. The alert arrives, you open the saved RDP profile, SSHive brings up the VPN if the server is not on your local network, and the Windows desktop opens. You check the Event Viewer, restart a service, run a PowerShell command. If the alert actually came from the Linux proxy in front, its SSH profile is in the same list.
On security, the connection uses NLA, so Windows authenticates you before it opens a session, and the server's certificate is pinned on the first connection: a different certificate later stops the connection instead of being accepted silently. Passwords stay in the iOS Keychain.
The limits are real. iOS suspends apps in the background, so an RDP session does not survive long in another app; when SSHive brought up a VPN for the session, leaving the app ends both the session and the VPN, so that the tunnel does not stay connected behind your back. On an iPhone the desktop is small; on an iPad the same session has room to breathe.