Well, I thought it was too much of a promise and propaganda to a non-practical app to use. Unless they change it and make the interface more friendly, I wouldnt recommend it to anyone. And the warm ups and exercises should be a lot more complete, with just the instrument sound for you to follow as described. It has potential, but unless they change it itll just be what it is - an incomplete app.
Kacildes about Voice Coach, v1.0.35