I need some basic information about Avast

I purchased Avast basic internet security for my pc. Does the basic program entitle me to protection on my mobile device, things like anti-virus and anti-theft, that is do I get something more than the free mobile app I can download from Avast? If I upgrade to premium on my pc does that include an upgrade to my mobile device as well? How many devices can I add to my account. Do I download the mobile app from my Avast account or can I just download the mobile app from Google store - in other words if I download from the G store and load it on my phone will I automatically get all of the features my Avast account entitles me to? If that makes any sense. ???
I’m sure these answers are somewhere on the Avast website but so far all I’ve found are a bunch of vague descriptions aimed at getting me to buy the product.
Thanks, Jim

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