This works surprisingly well – Note Hitter Lite Review

Does exactly what it says it does...good note sensitivity, and it only occasionally popped notes I didn't actually play. In a way, I find this demo is a little lacking. As an instrumentalist, the demo tempo is really, *really* slow. I'd like to be able to try some of the faster levels, if only for a little bit...took off a star for the limited nature of the lite version. This is an excellent tool for ear training, vocally. It's a huge help that the app shows what pitch you're actually snug, so you can compensate. Not sure if the full version includes it, but it would be nice to be able to play a starting pitch, and turn off the note hint, to really test yourself vocally. (Really, I think the vocal aspect of this app could stand by itself in its own app).
Review by Paisleyfrog on Note Hitter Lite.