Circle of Fifths Pro

Bamuda Corporation Pty Ltd

In-app purchases

About this app

Circle of Fifths Pro is a clear, modern reference tool for keys, chords, scales, and harmony.
Designed for musicians, students, and teachers, it visualises how music fits together — showing key signatures, chord families, modes, and functional harmony with ease.

Whether you're composing, improvising, studying theory, or teaching, Circle of Fifths Pro gives you a fast, intuitive way to explore the structure of Western music.

🎼 Keys & Harmony Reference
All 12 major and minor keys

Key signatures and accidentals

Relative minors, neighbors, and functional relationships

Tonic, subdominant, and dominant families

🎹 Diatonic Chords & Progressions
Diatonic chords for every key

Chord relationships within a scale

Common progressions and harmonic movement

🎵 Modes & Scales (Ionian → Locrian)
Modal patterns and scale tones

Side‑by‑side mode comparison

How modes relate to each key

🔍 Advanced Theory Tools (Pro)
Secondary dominants

Pivot chords

Modulation paths

Functional harmony overlays

Animated transitions for clearer understanding

🎧 Built for Musicians
Clean, minimal interface

Fast, intuitive interactions

Designed for composing and teaching

Works offline — no ads, no tracking, no data collection

⚙️ Improved Settings & UX
Settings update instantly in the UI

Panel closes naturally — tap outside or tap the button again

Smoother navigation and more responsive controls

🌍 Now Supporting 29 Languages
Circle of Fifths Pro now includes full support for Traditional Chinese, bringing the total to 29 languages.
The app automatically adapts to your device language for a more natural, global experience.

📚 Perfect For
Music students

Teachers and educators

Composers and arrangers

Guitarists, pianists, producers

Anyone exploring harmony and musical structure

🌟 A Modern Circle of Fifths
Circle of Fifths Pro combines a beautifully designed interface with a modern theory engine to make harmony feel natural, visual, and easy to navigate. Every feature is crafted to support real musical understanding — from beginners exploring keys to advanced musicians working with modulation and functional harmony.

What’s new

Added Borrowed Chords for expanded harmonic options

Added Modal Interchange with mode‑based chord variations

Improved Circle layout (big circle repositioned) for clearer UI/UX