Installation at second [parents] property

I have a Ring alarm with protect plus at my address and it's working great. My mum, however, lives on her own with an old, wired alarm system that is slowly failing. I am looking into the possibility of fitting her a new Ring alarm system.She is 88 and does not have a smart phone/device so it is not possible for her to use the Ring app.I obviously do have a smart device with the Ring app installed. I have a couple of questions.The installation at mum's house will be completely independent of mine and will not have a protect plan associated with it. The difficulty I have is the Ring app issue. Can I have a second, completely separate alarm system associated with my Ring app so I can set it up and monitor her house as well as mine? Thank you.