Wasn’t perfect but did a good job but can’t open since the last update on my phone and it doesn’t look like it’s writing updated again

App includes a few great algorithms for finding the key of a song. I like how they show the correlations with several key options. These are some tried and true methods for key determination. However, I feel like the UI is lacking and the feature set is limited. 1). You can't change inputs. The app only works through the microphone. You can't find the key of songs in your iTunes library. 2). The activation of the listen button is clunky. It's hard to tell exactly what the app is doing at the time. 3). It would be very interesting to have an option use the key finder with all the algorithms at once and use their correlations to weight their top two keys. That way you could get a consensus of the algorithms and possibly decrease error. It's an interesting app but limited in its ability and usefulness. A lot more work needs to be done before I could call it a powerful tool.

No instructions on how to use it.

The app is great but it won't open on my iPad, just my iPhone...