You can now select sound notation in the chord flashcard.

You can now select keyboard notation in the chord flashcard.

Chord flashcard feature has been added.

Added interval flashcard feature.

Added a settings to switch whether roots are required or not in the interval mode.

iOS 26 is now supported.

- A feature to display the correct answer has been added. - A feature to automatically determine incorrect answers has been added. - The dictionary feature has been removed.

Chinese, French, German, Italian, Korean, Portuguese, Spanish have been supported.

Stability of MIDI keyboard-related behavior has been improved.

Improved stability.

Fixed an issue where the app becomes unresponsive when chord edit screen is opened.

Hide Fn message in MIDI keyboard tester.

Added MIDI keyboard tester.

Modify texts in Settings.

Added a scale dictionary.

- Added answering method using submit button. - Added clear button to clear inputs. - Changed answering method in interval questions.

A damper pedal is now reflected.

Added scale exercises.

Fixed crash during diatonic mode.

Add review function. The same questions no longer appear consecutively.

Enhanced custom questions function.

- Fixed a problem that MIDI keyboards that support high-resolution velocity prefix is not responding.

- Add the custom playing feature of diatonic chord.

- Added support for Bluetooth MIDI keyboard connection.

- A list of connected MIDI keyboards can be displayed.