Brave talk as application on smartphone


After Google decided to discontinue Google Hangouts, I’d like to ask if it’s possible to modify Brave talk to have accounts and add contacts (could be up to 4) (like how Skype works) and have a web version and an android app.
It’s a really useful app, but will it work in the background if someone is using another application on tablet, as it’s a link?
It will still be more convenient if there is an app for smartphones and could add people or at least has the last meeting code saved

Thank you