Connecting a flow meter

Hi there Rachio community.

I will be using a Rachio 3 controller, and I want to install a water flow meter. I can see a list of compatible wired flow meters here:

OR:

A wireless flow meter ( Rachio Wireless Flow Meter Tech Specs).

Do I need any monthly subscription and/or any monthly fee to use these flow meters?

Thanks!

There is no fee for using flow meters.