The causes of death in the world are examined in two groups as non-communicable diseases (NCDs) and communicable diseases. NCDs are the most common cause of death in the last decade. The most common cause of death from NCDs is cardiovascular pathologies, especially acute coronary syndromes. Premature or sudden cardiac deaths constitute a significant proportion of these deaths. Most of the annual death rates in the world are in low and middle-income countries.86% of deaths in Turkey are caused by NCDs and 47% of these deaths are due to cardiovascular causes. The application of cardiopulmonary resuscitation(CPR) to out-of-hospital cardiac arrest patients is increasing day by day. In the studies performed, it was determined that the return of spontaneous circulation (ROSC) was higher in out-of-hospital cardiac arrest patients in whom CPR was performed by the witness (bystander) or by the healthcare worker (https://www.euro.who.int/__data/assets/pdf_file/0005/346694/BOH_ENG.pdf ).In another study, it was concluded that the survival rate was higher in out-of-hospital cardiac arrest patients in North America and Europe (https://link.springer.com/article/10.1186/s13054-020-2773-2 ).According to the AHA data, if CPR is performed within a few minutes, the chance of survival increases two or three times. In addition to its early application in cardiac arrest patients, its quality and accuracy also gain importance. In in-hospital cardiac arrests, as in out-of-hospital cardiac arrests, early and effective CPR seems to significantly increase the chance of survival. Another study showed that healthcare professionals' knowledge of CPR is directly proportional to the rate of spontaneous return (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7772790/). B/ALS trainings should be given to healthcare professionals, medical students, paramedics, nurses within the scope of early and effective implementation of CPR should be easily accessible and repeatable.There are 3 vital factors affecting survival in case of cardiac arrest according to the International Liaison Committee on Resuscitation Formula for Survival, these are:

- guidelines based on current resuscitation science
- effective education of resuscitation providers
- local implementation of guidelines during patient care
However, cardiopulmonary resuscitation (CPR) skills that are acquired immediately after basic life support (BLS) training often show decay by as early as 3 months, resulting in much BLS-trained medical staff struggling to perform guideline- compliant CPR during simulated and real cardiac arrests(https://www.ahajournals.org/doi/epub/10.1161/CIR.0000000000000903). Therefore, the main motivation of this project is to provide medical staff up-to-date, open, free access to B/ALS trainings that can function as booster trainings or complementary to in situ trainings when deemed necessary by the trainers (e.g.in case of a pandemic, for people with fewer opportunities who can't afford booster trainings)