Mobile Microphone turns your phone into a microphone.
Connect the audio out to a set of speakers and you have a megaphone.
If you have a phone with a FM transmitter, like Nokia N8, you can activate it and you have a wireless microphone that works with all FM radios.
Note: There is still a little delay in the audio but we are working on improving it
Decibel Meter turns your phone into a handy little sound level meter. It can measure peak, average in decibel (dB).
Use this app to find out whenever the noise around you gets too loud. Exposure to noise levels above 85 dB might damage your hearing