250+ iOS apps & games curated and reviewed
Every iPhone needs a few good circle of fifths guitar apps and games. We benchmark 250+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 4.9★ (222) | No | No | Sep 2026 | |
| 2 |  | Free was $9.99 | 4.8★ (6.3K) | No | Yes | Sep 2026 | |
| 3 |  | Free | — | No | No | May 2026 | |
| 4 |  | Free | — | No | No | Aug 2026 | |
| 5 |  | Free was $2.99 | 4.5★ (288) | Yes | Yes | Sep 2026 | |
| 6 |  | Free | 3.8★ (13) | No | No | Aug 2026 | |
| 7 |  | $4.99 | 4.8★ (1K) | No | No | Sep 2026 | |
| 8 |  | $0.99 was $1.99 | — | No | No | Jun 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.
