According to the rule of thumb in Japan, whistles help you survive after natural disasters such as Tsunamis and earthquakes. In particular, they will be beneficial in case that you cannot escape from collapsed buildings. However, it is not in practice to always hold a whistle for disasters that you cannot expect to occur. So, put it into your belongings, your smart phones. This will help you when accidents happen.
[ver. 1.5] - Automatically set the device's volume back when exitting. [ver. 1.4] - Automatically set the device's volume max. [ver. 1.3] - Fix: exit forcibly when switching a layout. [ver. 1.2] - Make the whistle sound louder than ver. 1.1. [ver. 1.1] - Make the whistle sound louder than ver. 1.0. - Fix: cannot stop playing sounds when pressing a button in particular timing.
The application has access to the following:
modify/delete SD card contents
Allows an application to write to the SD card.
read phone state and identity
Allows the application to access the phone features of the device. An application with this permission can determine the phone number and serial number of this phone, whether a call is active, the number that call is connected to, ect.