Shared users arming/disarming via the Ring App

Hi I'm the account holder and can therefore use the Ring app on my mobile phone to arm and disarm as well as using the keypad. When I set up another member of the family as a shared user I thought it would enable them to carry out the same action on the Ring app on their mobile phone. This doesn't seem to be doable so their only option to arm and disarm is from the keypad. Is this correct or am I missing something obvious? Is there another way they can arm and disarm using their mobile phone? Thanks