The "クロスゼロ for ファミリー" app is a comprehensive disaster preparedness tool designed to protect families from the moment a disaster strikes. It enables users to share vital information such as family members' safety, location data, and smartphone battery levels. The app features a dedicated chat function for real-time communication during emergencies, along with an automated safety check that simplifies the process of confirming family members' well-being.

In addition to family connectivity, the app provides timely notifications on disaster-related information, including earthquake alerts and severe weather warnings from the Japan Meteorological Agency. Users can manage their emergency supplies with tracking features for stock levels and expiration dates. The app also offers access to evacuation site information, hazard maps, and disaster education resources, ensuring that families are well-informed and prepared for various emergencies.