Remotix

This app is great! I use it to remote into Windows from an iPad or a Mac and it works flawlessly.
I can use my standard keyboard shortcuts for the clipboard on a Mac, and on the iPad an on-screen keyboard on the bottom allows me to choose a right-click.
It works over slower internet and does a better job at filling up my attached Monitor with the remote desktop, including background. Unlike Teamviewer or Connectwise. And it is less expensive.
The support via email takes a while but they always respond.

I don't know why this app doesn't get as much attention as Teamviewer. It works better over an iPad. On an iPad, the cellular to customer connection on Centurylink DSL still loads even when Connectwise or Teamviewer fails to load the remote desktop.

It also works from a Mac to Windows, and my system keyboard shortcuts don't need to change. The clipboard still works across devices, as long as you copy after Remotix is open. I keep trying to copy before I open Remotix, and then it fails to transfer.

Remote, square monitors are more easily viewed than in Teamviewer (unless they changed recently), and tech support through email, while slow, still gets a response.