Hey ! Just purchased it, i'm really impressed it's a great app (maybe the most practical meter I've ever used)
A few things could make this even better:
1/ Be able to set the frequency ranges for the RGB in the Waveform
2/ Be able to display the full audio channel in the Waveform (like in a DJ app - see rekordbox display for instance)
3/ Add a correlation meter with the stereometer + frequency ranges for the RGB
4/ Add a cross (instead of a vertical line) in the spectrum analyzer to display both frequency & dB level