This is the revolutionary piano app to support the practice of playing chords.

This app can display each note of the component tones (root, triad, 7th, tension, on chord) of selected chord on the keyboard, play chord sound.
In addition, it has 6 octaves keyboard, and it can display immediately the chord name to match the configuration notes you pressed.

As the main features of this app, it has the function to play chords as sequencer of up to 16 bar.
This app supports you when you practice the songs that are configured in the chord such as popular music and jazz.

Registration method of chord:
- Enter the chord from the keys on the screen.
- Create a chord by selecting each items from the chord selection screen.
- This app supports Core MIDI. You can perform it by connecting a MIDI-compatible keyboard.
(It might be limited the corresponding MIDI keyboard.)

- If you'd like to input or display all the chord patterns including tension (b9, # 9, 11, # 11, b13, 13), You need In-App Purchase.
- There are 18 types in all kinds of sound. (It is 6 kinds can be used in the initial state. To use all type, you need In-App Purchase.)
- The chord set can save or load as a sequencer. (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)

We'll update this app to help you in the future.

What’s New

Version 1.7.6

Fixed about the system aside.

Ratings and Reviews

5.0 out of 5
2 Ratings

2 Ratings

MLeeJackson ,

Good app

It’s a cool app I believe with a little more effort and more presents and a prettier interface this app could really take the music world by storm whoever developed this app , it’s simply amazing keep at it .

Pianoplaya13 ,


The notes won't stay selected so you have to hit them lol together to get the chord name. Needs improvement.

Developer Response ,

There is a choice "keyboard type" by setting (button on upper right).
Please try "monophonic" mode.
Perhaps it will meet the requirements.

John gatewood ,

Piano chord

Can't get app to work. Need to do analysis on complex chords. No support is available. App Store should provide support.

Developer Response ,

Thanks for your comment.
Please try with latest version (1.4.1).


5.9 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Japanese

Age Rating
In-App Purchases
  1. All chords are available $0.99
  2. Save chords list / seq data $0.99
  3. All sounds are available $0.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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