Spectroid uses multiple FFTs overlapped in frequency in order to provide better frequency resolution at lower frequencies than a single FFT. The caveat of this method is varied impulse response and minor discontinuities in the frequency graph. The upside is that it can efficiently produce a frequency graph that better matches the frequency resolution of human audio perception. Even so, it is limited by the Fourier uncertainty principle, while human audio perception is not.
It's the best realtime spectrum analyser for android. Would be nice to have some more options that could be adjusted, but still great! And so small!
By far the best audio analysis app I've used. Great functionality. I plan on using this app for my live sound applications.
Can't use my second microphone but overall this is the best analyzer.