Can I use Nitro on more than one device?
You can use more than one device without subscribing to the multiple device plan just not at the same time. You need to log out of one device and then login to the other device. On a Multi Device plan for 2 and 3 devices you may login at different locations with different ip’s. On the unlimited device plan you must be on the same wifi (same ip).
If I subscribe to the entire home unlimited devices, can I also have one box at a relatives?
NO, this plan covers your entire home only and is locked to your home ip. It will not work anywhere else outside your home.
If I subscribe to the 2 or 3 device plan, will I be able to watch the devices at the same time?
Yes, this plan covers 2 or 3 devices that can be used at different locations at the same time.