Key is a simply designed music app. With Key, you can see how to play chords in major and minor keys, and listen to them too. You can also generate random chord progressions. Key writes the music for you!
Open Key and you are greeted with beautiful and inviting colors. Choose a key from the colorful list and see the chords in that key. From there, either tap a chord for more info and to listen to it, or tap the randomize button to generate a progression. To return to the main list of keys, swipe right.