The American Red Cross has launched its official Tornado App, putting lifesaving information right in the hands of people who live in, visit or have loved ones in tornado-prone areas.

This free app — available in English or Spanish — gives iPhone, iPad and Android smart phone and tablet users instant access to local and real-time information, so they know what to do before, during and after a tornado.

The app includes a high-pitched siren and “tornado warning!” alert that signals people when a NOAA tornado warning has been issued in their area — even if the app is closed. An “all clear!” alert lets users know when a tornado warning has expired or has been cancelled.