Remote.It is an application that allows you to access certain services (like programs or files) on one device from another device on the same local network (LAN). This is called a "jump service" or "jump box."
Instructions for setting up a jump box
Add your access points
At this point you have access to your jump box. To continue, you will need to make sure that it is connected to the network of the device(s) you want to access. This network can be private without internet access if you also have cellular internet access
There are some common examples of things you may want to access on your network and how you can make connections once you have added them.
You will need to know either the device name (hostname) or LAN IP address.
The next few articles have some examples.