|Utilities||Free||Hongwen Yang||iPhone, iPad, iPod|
+ Calibrated with a professional high-precision sound level meter.
+ Tracking any sound level over 80 db and show you the total harmful dB duration and details before it hurts your hearing.
+ Show users real-time dB graphical display as well as save the records with renaming feature.
+ Support iTunes File sharing feature, easily transfer records from your devices to a computer.
+ It can work in the background.