How to do mobile reminders and events on close?

Hey all. I’m close to launching my mobile game and all I’m missing is a mobile reminder for when they haven’t played in a while and auto-saving on close. I’m currently building in UE4.24 Blueprints. I’m not sure how to implement those features. Any advice? Are there specific handlers built in or is this something I’m going to have to build myself?

Thanks!