Musical Gyro

Musical Gyro is a fantastic learning app for music teachers and students, and lots of fun for everyone else.
A gyroscopic music machine, it allows you to move and rotate your iPhone or iPad to create, visualize, and understand music. Just start it up, select a soundscape, and move and rotate your device to create music.
Fun for beginners, you can play around, or explore the built in soundscapes to introduce yourself to chords, scales, and reverb.
For music students, teachers, and even experts, the affordable Music Theory in app purchase allows you to explore dozens of chords, from common to truly obscure, and move through many different types of scales, and transpositions.  
Sure, most pianists or keyboardists can play major and minor chords, up major and minor scales. Musical Gyro takes you way beyond that, to chords and scales that would be challenging for a seasoned pro. Try listening to something truly obscure, like running augM7 (Augmented major 7th) chords up and down the Pentatonic, or Melodic minor scales, and see the exact piano key positions, musical notation.