With this app you may listen the tuning fork sound, simply touching the picture or shaking the device, or you can check the correctness of the sound played by your tuning fork or pitch pipe.
This application has a tuner too, and "listen" the sound of a natural A note. The device tool shows the exact Hertz frequency.
Inside you can find an interesting e-book learning curiosities and history of the tuning fork.
Des Enfants Tuning Fork has original graphics.