Real time frequency/spectrum analyzer allows you to record and play back the recordings while observing time signal and frequency spectrum in real time. The sampling frequency can be adjusted by the user. It starts at 200Hz and goes up to 44.1kHz. The recorded files can be deleted, if desired, from the app. The spectrum can be displayed in linear or logarithmic scale (dB), user specified number of points for FFT, interpolation factor, perform integration and differentiation and computed with various windowing functions. There is user configurable spectrum averaging available.