When you are under the debris or in case of emergency, it will whistle and your location will be determined and it will inform you whether you are safe by sending an SMS to the numbers you have previously determined. If you lock the screen when the whistle is blown in the application, the whistle will continue to sound. In this way, charging can be saved.Our app does not contain ads. and it is an application made on behalf of humanity, not for the purpose of obtaining any financial income or collecting data. I would appreciate it if you would make your comments and criticisms in this way.