'AudioTools' lets you turn your device into a professional sound analysis Gadget. Using professional Fast Fourier Transform (FFT) algorithm this app gives you the ability to select from a sound sensor, a spectrum analyser and a spectrogram. All three sensors detect all frequencies from 1 Hz to 20 KHz from your device microphone.

Test your voice and check out what pitch/frequency you can reach when you whistle, talk or laugh. Use this gadget to detect undetectable ultrasound, background noise or any instrumentís frequency.

Get it for free on google play: