• Refined note-group practice and keyboard layout, with selectable 1-octave and 2-octave ranges • Added card/dice-style displays for movable-do and angle relationships • Made Bright/Dark direction easier to read with circles, X marks, color, and consistent card patterns • Made lowest- and highest-note highlights independent so they remain correct in compact keyboard ranges • Added a preference for the clockwise pitch order around the fifths circle • Reorganized chord, degree, and custom-notation text into the four corners while keeping chord candidates in a dedicated box • Added compact landscape navigation, hideable portrait tabs, and improved iPhone/iPad layouts • Localized chord capture, section markers, and automatic recovery in six languages, with improved overall stability

■ Custom chord notation Added custom chord notation based on DarkAngle, K1, K1→K2 movement, K2 scale degree, and BrightAngle. Displayed the K2 movement as a small center value with a minus sign for negative movement. ■ K1 / K2 Improved K2 movable-do display. Improved the K2 region in Disk Lock mode. Kept K1, K2, DarkAngle, BrightAngle, and custom chord notation consistent across display modes. ■ MIDI playback Added playback speed control. Added show/hide playback controls. Improved playback control layout. ■ Chord capture Added manual chord capture during MIDI playback. Added text export. Added export options for time signature and MIDI start beat. Added one chord per line and one measure per line export formats. Added selectable export fields. ■ Section markers Added A, B, C, and D section markers. ■ Keyboard Added keyboard size adjustment. Added white key outlines. Improved screen layout. ■ Chord analysis Improved chord analysis. Improved chord candidate display. ■ MIDI Improved MIDI input handling. Improved live input and MIDI playback processing. Updated the sample MIDI. ■ Other Fixed unintended iOS double-tap behavior. Improved UI and layout. Fixed various issues.

Added a note name highlight feature Added a chord candidate display feature Added a feature to display chord tones and other information

Added a piano keyboard display feature

Trainer target rings now show progress by changing color for notes that have been pressed Chords no longer require simultaneous input: press all target notes in any order to advance (wrong notes reset progress) Removed redundant text

Added guide lines (concentric arcs) Updated the notation of note guide numbers

Disable text selection on long press Add the ability to tap and play the nearest note on the circular disk Add preset slots that allow settings to be saved

Added new languages to the language settings: Portuguese (Brazil) Spanish (Mexico) Korean Simplified Chinese

Add transpose option for MIDI playback and training. Add ability to change the MIDI playback position via the seek bar. Fix a bug where changing the seek bar value altered the text width, causing line breaks and preventing further value changes. Add the ability to rotate the disk by dragging. Fix a bug where the displayed maximum rotation speed value did not update after resetting to the default settings. Change the damping value display to use integers.

New Features & Improvements Added a new visualization option that renders direction-based color gradients and numeric indicators inside each note. Bug Fixes Fixed an issue where a loaded MIDI file would always restart from the beginning when playback was resumed after pausing. Fixed an issue where certain UI screens could not be scrolled properly.

Added orange connecting lines between tones (adjustable transparency) Included out-of-range tones in disk calculation Added a reset-to-defaults button

Reduced the green target circle size to 75% Added target-range cut functionality Added an option to immediately set angular velocity to 0 when angular acceleration is 0 (toggleable) Added numeric rank labels for mid-range notes Changed damping range to 0%–99.9% and switched ticks from logarithmic to linear Displayed out-of-range notes at the angle of the nearest same-named note within the target range (use a non-white color) Hardened WKWebView content access controls

* Emphasize the 440 Hz circle. * Emphasize the line for A. * Set the default opacity of note names to 0%. * Improve line visibility. * Add a default sample practice MIDI. * Fix sections that were not English-compatible.