Good app but some things should be improved.
I use it mainly for Functional Ear Training. It works but there are some limitations that in my opinion should be addressed. The only cadence available is V-I. It would be great if it included I-IV-V-I as well. More importantly, the note to identify is limited to one octave. There should be an option to select "restricted to one octave" on/off. More sounds apart from piano and organ would be nice (e.g. electric piano) but this is a very minor point. [edit] Excellent customer service. The developer updated the app following some of my suggestions. The update doesn't cover 100% exactly what I hoped for but it shows that they listen. I couldn't find any email address to communicate with the company on the web site. I think it is something that should be addressed. Overall a good app.