Harmonizer vs ChordsVault
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Harmonizer
This app helps infants develop perfect pitch by playing Shepard tones, aiding in pitch identity development. It also facilitates the study of chord relationships and displays the pitch of your singing.
- Shepard tone playback
- Pitch identity development
- Chord relationship study
- Vocal pitch display
- Infant music education
Read full descriptionHide full description
See and hear how music fits together. Harmonizer turns musical relationships into a colorful, interactive grid. Tap a hexagon to hear a note, or tap the triangle between three notes to play a major or minor chord. Sing or play a single note on an instrument, and watch the detected pitch light up. EXPLORE NOTES AND CHORDS Discover how neighboring notes connect through perfect fifths, major thirds, and minor thirds. Major and minor chords form triangles, making harmony something you can see, hear, and explore with your fingers. SEE YOUR VOICE Use the microphone to highlight the pitch you sing or play. Listen to a note, try matching it with your voice, and explore the connection between sound and color. CHOOSE YOUR LABELS Show note names or Movable Do syllables, with your choice of tonic. Keep labels visible, show them only when notes are active, or hide them to focus on the colors and sounds. EXPLORE YOUR WAY Choose from playing, pitch detection, or a mode that listens when you stop playing. Adjust the grid size to suit your screen and how you like to interact. HEAR HARMONY DIFFERENTLY Harmonizer uses Shepard tones—layered sounds that emphasize a note’s identity without a distinct octave. Every hexagon with the same note name produces the same sound. For curious beginners, students, teachers, and musicians, Harmonizer offers a hands-on way to explore pitch, chords, and musical patterns. No music theory knowledge is needed to start: touch a note and listen. Pitch detection requires microphone access.
ChordsVault
Create, design, and share guitar and instrument chords and songs. This app offers flexibility for transcribers and performers, allowing on-the-fly chord design, reuse, sharing, and transposition to different keys, tunings, and instruments.
- Create and design chords
- Share songs and chords
- Reuse chords between songs
- Transpose songs to different keys
- Support for various instruments and tunings
Read full descriptionHide full description
ChordsVault is the mobile entry into the ChordsVault portal for creating, designing and sharing guitar (and other instruments) chords and songs. ChordsVault is easy to use but provides great flexibility for songs transcribers and song readers / performers. Unlike many other sites, ChordsVault lets you design chords on the fly, reuse chords between songs, share songs and chords, and transpose songs to different keys, tunings and instruments.
Screenshots
Verdict
The clearest difference is rating: ChordsVault at 5.0 against Harmonizer's 4.1. ChordsVault also leads on update cadence (every 6 weeks vs every 33 months) and device support (3 vs 1). Harmonizer's advantage is ratings volume (16 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
ChordsVault holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Harmonizer has 16 ratings behind it against 1, so its average is the more settled of the two.
Harmonizer ships an update every 33 months, ChordsVault every 6 weeks. The most recent releases landed on October 14, 2026 and October 2, 2026 respectively.
| Parameter | Harmonizer | ChordsVault |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (16 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 45.5% of reviews | — |
| Number of ratings | 16 — better | 1 |
| Update frequency | Every 33 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 6.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Matthew McLaughlin | Valentin Chernyak |
Customer experience
Harmonizer
ChordsVault
In-app purchases
Harmonizer
No in-app purchases
ChordsVault
No in-app purchases









