Accessing Television Channel Control Through Computer Option/s

Dear Sirs:

I am requesting specific instructions for setting up an option for adjusting the channels through the use of commands on a computer. This is a secondary alternative when the remote is not accessible.  In my particular case - both TV remotes have been temporarily displaced.

I have requested a remote replacement. I am requesting this direction during the interim- until the new remote can be obtained. It is my understanding that there is a download option for an IPhone -the Xfinity Remote App. I do not have an IPhone at the present time. This is the reason for my request for remote control use (access) through the computer in lieu of an IPhone.

Thank you for your time and cooperation with this request.