Spectre FFT creates beautiful spectrograms showing the frequency content of your audio data. It can use your device microphone to monitor your voice or surroundings, or internal audio from your background audio apps. An oscilloscope and spectrum analyzer are included to visualize the data. Audio sample rate from 8000 to 44100 Hz. FFT size from 128 to 2048.
You can get the installation package of Spectre FFT 1.10 for free and check out users' reviews on Droid Informer. The app requires Android 2.3 and above. This download is completely secure. Tim Carter Apps developed this application that falls into the Music & Audio category.