# Harmonizer vs B

The clearest difference is price: Harmonizer at Free against B's $1.99. Harmonizer also leads on rating (4.1 vs 3.5) and ratings volume (16 vs 2). B's advantage is update cadence (every 9 months vs every 33 months) and iOS requirement (10.0 vs 17.0). On review sentiment, ads, in-app purchases and device support there is nothing between them.

Harmonizer is free to download; B costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Harmonizer holds the better App Store score, 4.1 against 3.5. That said, the two scores are not equally well evidenced: Harmonizer has 16 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 45% of Harmonizer's written reviews are positive against 50% of B's, so the app with the better star average is not the one people write more warmly about.

Harmonizer ships an update every 33 months, B every 9 months. The most recent releases landed on October 14, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Harmonizer | B |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.1 (16 ratings)](https://appshunter.io/ios/app/harmonizer/id393762975/reviews)** | [3.5 (2 ratings)](https://appshunter.io/ios/app/b-system-cba-accordion-tutor/id1037609940/reviews) |
| Number of ratings | **16** | 2 |
| Positive reviews | 45.5% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 33 months | **Every 9 months** |
| Monetization | **Free** | Paid |
| Size | 3 MB | 29 MB |
| Requires iOS | 17.0 | **10.0** |
| Devices | iPad | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Matthew McLaughlin](https://appshunter.io/developer/1671041622) | [Michael Eskin](https://appshunter.io/developer/342739369) |

## What reviewers say

### Harmonizer

[App page](https://appshunter.io/ios/app/harmonizer/id393762975)

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.

**Highlights:** Shepard tone playback, Pitch identity development, Chord relationship study, Vocal pitch display, Infant music education

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### B

[App page](https://appshunter.io/ios/app/b-system-cba-accordion-tutor/id1037609940)

Learn the notes on the treble side of a B-System Chromatic Button Accordion with a built-in note guide. Features high-quality sampled notes and a responsive button board for melodies and chords. Connect to external speakers for amplified sound.

**Highlights:** Built-in note guide, High-quality sampled notes, Responsive button board, Melody and chord playing, External speaker support, Toggleable note names

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Harmonizer free?

Harmonizer is free to download, with no in-app purchases.

### Is B free?

B costs $1.99, with no in-app purchases.

### Which has better reviews, Harmonizer or B?

Harmonizer is rated higher. Harmonizer averages 4.1 out of 5 from 16 ratings, while B averages 3.5 from 2 ratings.

### Do Harmonizer or B have ads?

Neither Harmonizer nor B shows ads.

### Which is updated more often, Harmonizer or B?

Harmonizer ships an update every 33 months, and B every 9 months. Most recently, Harmonizer was updated on October 14, 2026 and B on October 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*