This app is a simple and intuitive tool designed to quickly and efficiently confirm safety in the event of a disaster. When a disaster occurs, a specific employee activates the system and a push notification is sent to all employees. Employees who receive the notification can respond to their safety status on the app with simple operations, and the information is managed in real time. In addition, the answers are saved as a history and can be easily checked if necessary. Specific employees can manage the response status of their subordinates and understand the overall safety status at a glance. This app emphasizes simplicity and ease of use, and supports faster and more accurate safety checks during disasters.