I'm very impressed with this tuner. The graphics are good and the sensativity is excellent. Worth the price.

This tuner works very well. It reacts instantly, and is not bothered by background noise. It responds slightly to other musical tones in the room, but apparently, not enough to affect performance. As a violin student, I use it while practicing scales and playing pieces. The quality of the note can be instantly seen during play. I lock rotation and place the iPad on end on the music stand. Seeing the keyboard laterally is more intuitive for me. The "waterfall" is easy to interpret.