https://www.ambulance.vic.gov.au/goodsam/
GoodSAM is a free global smartphone app that alerts responders to someone nearby in cardiac arrest. GoodSAM is linked to the Triple Zero (000) communications centre, so as soon as an ambulance is dispatched, a GoodSAM alert will notify you.
GoodSAM (Smartphone Activated Medic) connects responders to patients in those first critical minutes of cardiac arrest while paramedics are on the way.
Cardiac arrest is often unexpected. For every minute a patient doesn’t get CPR/defibrillation, their chances of survival fall by 10%.