--- title: "Circle o Fifths: Music Theory — App Overview" url: https://marlvel.ai/apps/com-sleeplaugh-circleofifths category: Music developer: Tim Mueller platforms: ios rating: 4.8 (1K ratings) pricing: paid report_level: overview generated: 2026-04-18 last_verified: "2026-04-20T12:06:23.070Z" --- > **Key Insight:** This app serves as a functional, interactive reference tool for guitarists to visualize and hear the relationships between chords and keys. | Metric | Value | |--------|-------| | Category | Music | | Rating | 4.8 ★ (1K) | | Pricing | paid | | Platforms | iOS | | Latest Version (iOS) | 1.3.4 | | Developer | Tim Mueller | ## What is Circle o Fifths: Music Theory? Circle of Fifths: Music Theory is a specialized educational tool designed to help musicians master music theory and chord relationships. It provides an interactive, color-coded interface featuring three rings of major, minor, and diminished keys to assist with practice and songwriting. ## Key Features - **Interactive Circle Interface**: Features three rings covering major, minor, and diminished keys with color-coded note and chord identification. - **Audio and Visual References**: Includes 36 real guitar audio recordings and corresponding chord charts for every note on the circle. - **Chords Tab**: Allows users to view all chords within a specific key and toggle between major and minor relationships. ## Who is it for? Musicians and students looking to improve their understanding of music theory and guitar chord structures. ## Links - [App Store](https://apps.apple.com/us/app/circle-o-fifths-music-theory/id1499417636?uo=2) - [Full Intelligence Report](https://marlvel.ai/apps/com-sleeplaugh-circleofifths) --- *This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/apps/com-sleeplaugh-circleofifths).* *Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*