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

[Chord List]
The chord button list consists of 54 chord pattern rows and 12 key columns.

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 Android app "Piano Chords Master".