[Question] Notification and keep personal app state

Hi everyone,

I'm starting to build personal tab app. What I wanted to achieve is to have the app a notification. Here's a scenario, I open the application on the left side navigation and do some operation, then I switch other app like chat. If something happened to the application the application will show a notification similar to activity feeds. Then, I'll open it again but the application should not be reloaded or refresh. 

So basically does the microsoft custom apps offers the personal tab app to remain its state(without refreshing/reloading) when switching between application, and have notifications similar to notification new feeds? If possible, I also wanted to have control about the visibility of the notification inside the application, for instance, even though the application is already open I want the notification to remain visible. Is the above functionality possible? Please let me know.

Thank you.