Once you've logged in to your "alarm.com app", follow the instructions below.
Armed Stay is designed for when you plan on arming the system and staying in the home.
Armed Away is for when you plan on arming the system and leaving the home.
Disarmed from Arm Stay
To disarm the system from your iPhone, follow the instructions below...
Disarmed from Arm Away
Disarming when entering the premises.