How to get App for monitoring camera on my home computer

The web site says I can monitor the camera on my home computer. I can't find the app. Where is it located? I have it on my Iphone but can't find it for my desk computer.
I understand that there is a $19.99 charge per month for live camera monitoring. Is it more if I add another camera?
What is the range on the fob control?

This conversation is no longer open for comments or replies and is no longer visible to community members.