This would be a solid 5 star for me of it could simply show the spectrum without having to record any audio. Something like a monitor mode where it just shows a live spectrograph. I do a lot of sound and stage work. A feature like what I'm suggesting would make this a staple app for me. What it does so far is great. I sincerely appreciate that it's completely add free. So one tweak to it and you get 5 stars and a recommendation to other professionals from me.

Perfect colors, nice window choices, but these are largely irrelevant. Best improvement would be more options for frequency range to display and number of points for width of spectrogram. Need to be able to change x and y ranges.

If this app can show spectrum from audio file it will be 5 star

Good, but not great. While this is one of the better analyzers, it lacks usefull features like the ability to zoom, save and load the spectrum. If you're not looking for features like that this isn't bad. I've yet to find an app with editing features like souund or harmonic removal like the ISSE spectrogram editor for computers, but I have found other apps that are further along for these types of things. Again not bad for what it is.

First and foremost, it would be much more useful for my needs (classical singer) if it had a frequency range selector, since i really only need a couple KHz. Also features like importing recorded audio, tabbed comparison of two files... Think about developing it a bit more, I don't think there's a proper Android app that could cater to singers and voice analysis, compared to the iWorld. Would gladly shell out some money for it.

Good app with a few problems Unfortunately, the only way I could find to lower the frame length (changing the resolution) drastically reduced the quality as well, making it useless for most of the things I wanted to look at. I am not sure if this is a glitch or simply a problem with FFT, but it seems like I should just be able to zoom in on the high quality visualization (and the screenshots would suggest that that's possible). Except for that however, it is quite respectable spectrograph app overall.