Harmony & Counterpoint

Available

Music Theory, Ear Training & Composition Practice — Version 2.6

Harmony & Counterpoint is a comprehensive music theory learning app designed to connect theoretical knowledge with practical musical writing. Study harmony, counterpoint, voice leading, solfège, ear training, instrumentation, orchestration, and jazz arranging through structured lessons and notation-based exercises.

Rather than simply reading explanations, you can enter notes, solve musical problems, and receive immediate feedback. The Learning Guide and Note Input Guide help you understand how to progress through each subject and use the notation tools effectively.

Whether you are studying composition, arranging, music theory, or preparing for formal music education, Harmony & Counterpoint provides a structured path from fundamental concepts to more advanced writing techniques.

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One practice path for the language of music

Go from hearing and understanding music to writing, arranging, and checking your own work — with a clear next step every time you practice.

Harmony

Build four-part harmony with chord function, inversions, figured bass, and practical voice-leading feedback.

Counterpoint

Write independent melodic lines through species-based exercises inspired by the Fux tradition.

Solfège & Ear Training

Connect hearing, singing, and notation through a progressive path from four-note foundations to larger intervals.

Instrumentation & Orchestration

Learn register, playable range, instrumental roles, and orchestral color through real score excerpts.

Jazz Study

Explore chord symbols, extensions, tensions, functional harmony, and the foundations of improvisation.

Guided Daily Practice

Use level assessment, goals, study planning, daily questions, and reminders to keep building a musical habit.

Main areas of study

Harmony and voice leading
Species counterpoint
Music theory and notation
Solfège and ear training
Instrumentation
Orchestration
Jazz harmony and arranging
Practical notation exercises
Immediate feedback and learning progress

Version 2.6

Current release. Released on August 28, 2026.

Refined counterpoint evaluation

Octaves and idiomatic passing dissonances in third species are now evaluated more appropriately.

More natural Styles examples

Styles examples now avoid unnatural consecutive repetitions of the same note.

Version 2.5

Previous release: deeper Instrumentation & Orchestration and Jazz Study, flexible daily and weekly learning paths, and Work Portfolio.

Screenshots

A connected learning path: start with a clear next step, write in notation, then develop your listening and arranging skills.

Harmony & Counterpoint home screen with its learning paths — One home for harmony, counterpoint, listening, and orchestration.

Practice with a direction

Start from a level that fits, take one meaningful daily question, and move from theory to listening and writing in one place.

Write and understand

Counterpoint notation editor with piano input — Build a counterline directly on the staff.

Harmony notation editor highlighting an answer to check — See the exact note and moment to review.

Daily counterpoint question and weekly creative mission — Daily practice and a weekly creative task.

Hear and arrange

Solfege and ear-training roadmap — Grow from four-note foundations step by step.

Orchestration study using a Beethoven score excerpt — Listen into real orchestral score excerpts.

Violin range and core-register study screen — Learn each instrument's range and role.

Support

Send bug reports and feature requests to kjdevapphelp@gmail.com .

Please include: app version / iOS version / reproduction steps