247+ iOS apps curated and reviewed
Out of 247+ circle of fifths apps on iOS, 15 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 4.9★ (222) | No | No | Jul 2026 | |
| 2 |  | Free was $9.99 | 4.8★ (6.3K) | No | Yes | Sep 2026 | |
| 3 |  | Free | 4.8★ (125) | No | Yes | Sep 2026 | |
| 4 |  | Free | 3.8★ (4) | No | No | Jul 2026 | |
| 5 |  | $4.99 | 4.8★ (1K) | No | No | Sep 2026 | |
| 6 |  | Free | 3.8★ (13) | No | No | Aug 2026 | |
| 7 |  | Free was $2.99 | 4.5★ (288) | Yes | Yes | Sep 2026 | |
| 8 |  | Free | — | — | No | Jul 2026 |
Explore music theory with a visual representation of the 12 keys. Understand scales, compose chord progressions, and mix in key. Features color-coded relationships, key signatures, and sounded chords for each key.
This app helps musicians of all levels write songs, find chords, and learn music theory. It offers tools for chord and scale practice, MIDI and PDF export, and collaboration features for songwriters and producers.
Master music theory with an interactive Circle of Fifths. Learn key signatures, chords in key, and chord shapes with visual aids and audio playback. Ideal for musicians of all levels to deepen their understanding of harmony.
