This app can easily check the sound of the chord tone and the display on the keyboard.

[Chord List]
You can select the chord button list display from the following patterns.
- Vertical : It displays in 54 types of chord pattern rows and 12 key columns.
- Horizontal : It displays in 12 key rows and 54 chord pattern columns.
- Each keys : It displays 54 types of chord patterns in a list for each of the 12 keys.

When the chord button is tapped, the selected chord is played and the chord tone is displayed on the keyboard.
* If you'd like to display all the chord patterns including tension (b9, # 9, 11, # 11, b13, 13), You need In-App Purchase.

[Chord Progress]
It places chord buttons for typical chord progressions, so you can easily check the sound of the chord progression.
You can also change the route to each of the 12 keys.

[Keyboard]
The keyboard can be slid with the slider. (range: C2 ~ C7)
The keyboard also supports playing.

* There are 28 types in all kinds of sound. (It is 9 kinds can be used in the initial state. To use all type, you need In-App Purchase.)
* Supports Bluetooth MIDI connection.
* Supports sending MIDI messages (note on / off). (To use this, you need In-App Purchase.)

Chord list:
M, 7, 7(b5), 7(#5), 6, 6 9, 9, add9, M7, M9, M7(b5), M7(#5), m, m6, m6 9, m(#5), m add9, m7, mM7, m7(b5), m7(#5), m9, mM9, aug, dim, dim7, sus4, 7sus4, 9sus4, M7sus4, M9sus4
(To use below, you need In-App Purchase.)
7(b9), 7(#9), 7(#11), 7(b13), 7(13), 7(b9 #11), 7(b9 b13), 7(b9 13), 9(#11), 9(b13), 9(13), 7(#9 #11), 7(#9 b13), 7(#9 13), M7(#11), M9(#11), M7(13), M9(13), m7(11), m7(13), m9(11), m7(b5 11), m7(b5 13)


If you would like to use features such as playing on a large keyboard or creating chord progressions, try iOS app "Piano Chords Master".