Reduce Lag Time for App Notifications?

Hi All,

I am working on my first HA project - a simple alarm system. I am using Alarmo and it is working great. However, I have noticed that when I disarm the alarm via my app, it takes almost 15 seconds to actually shut off the siren/alarm. I assume this is because my app is going through the internet to Duck DNS, then back to my router and to HA? Is there a way for me to access my HA locally via the app when I am home, instead of going out to space and coming back? I assume that would drastically reduce the lag time, yes?

I also set off my alarm and didnt get an app push notification for several minutes. Basically, I am wondering what I need to do to speed up my system notifications and actions via the app.

Any feedback is greatly appreciated.