This App is severely un-finished and incorrect.
WenDELL BETTON write:
If you already have a full understanding of how to use the circle of 5ths then you can use this. BUT, if you only partially understand, I have found it can be confusing. I have such full understanding and I have found some flaws in it. I was JUST experimenting with it and as an example, I entered the tonic (i.e. the key) of C and put the "mode" setting on aeolian... Now, the last time I checked (rhetorically speaking, of course), the aeolian mode of a tonic is the relative minor of said tonic. THIS APP tells me the aeolian mode of the tonic, C, is Ab Aeolian, which is incorrect; it's A Aeolian. I do see, however, that the capital Roman numeral, IV, is designating the Ab, so that seems to infer that I should sharp (augment) that Ab. IF that's the case, then using this app is FAR too confusing for anyone not having this understanding! PLEASE BE AWARE this app URGENTLY NEEDS a DO-OVER! Until then, invest your money in the other circle of 5ths app.