# Sonofield Ear Trainer vs Interval Matrix Pro

The clearest difference is ratings volume: Sonofield Ear Trainer at 376 against Interval Matrix Pro's 2. Sonofield Ear Trainer also leads on iOS requirement (13.0 vs 15.1). Interval Matrix Pro's advantage is review sentiment (100% vs 89%). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Sonofield Ear Trainer sells 4 one-off in-app purchases and Interval Matrix Pro sells 4 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for Sonofield Ear Trainer against 5.0 for Interval Matrix Pro. That said, the two scores are not equally well evidenced: Sonofield Ear Trainer has 376 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 89% of Sonofield Ear Trainer's written reviews are positive against 100% of Interval Matrix Pro's.

Sonofield Ear Trainer ships an update every 9 days, Interval Matrix Pro weekly. The most recent releases landed on October 14, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Sonofield Ear Trainer | Interval Matrix Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (376 ratings)](https://appshunter.io/ios/app/sonofield-ear-trainer/id6740409139/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/interval-matrix-pro/id6756457753/reviews)** |
| Number of ratings | **376** | 2 |
| Positive reviews | 88.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 105 MB | 44 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Sonofield Ear Trainer Education Ltd.](https://appshunter.io/developer/1789801335) | [JIMMY MICHAEL HUDSON](https://appshunter.io/developer/1860733207) |

## What reviewers say

### Sonofield Ear Trainer

[App page](https://appshunter.io/ios/app/sonofield-ear-trainer/id6740409139)

This app helps musicians develop their ear by focusing on the feeling of individual notes within a key, rather than traditional interval training. It uses sustained drones and offers various modes like identifying scale degrees, melodies, and singing exercises. The app adapts to your skill level with an intuitive interface and progression path.

**Highlights:** Feeling-based note recognition, Scale degree identification, Melody recognition training, Singing exercises, Hands-free training mode, Interactive exploration instrument

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro | $14.99 | one-time |
| Lifetime Pro | $17.99 | one-time |
| Lifetime Pro | $19.99 | one-time |
| Lifetime Pro | $24.99 | one-time |

**What reviewers like**

- 🚀 Excellent ear training tool
- 👍 Intuitive and user-friendly design
- 🎶 Effective for improving relative pitch
- 💡 Innovative use of drone and scale degrees
- 🎯 Helpful for aural skills development

**What reviewers complain about**

- 🤔 Challenging for true beginners
- 💭 Desire for more customization options

**Reported bugs**

- None reported

**Requested features**

- Option to switch between 12TET and just intonation
- Ability to reduce octave range
- Incorporate more timbre options for drone and notes
- Tracking and visualization of progress and learned skills
- Add interactive tutorial for level 1


### Interval Matrix Pro

[App page](https://appshunter.io/ios/app/interval-matrix-pro/id6756457753)

Visualize music theory concepts like scales, chords, and intervals across various instruments. This app uses a unique color-coding system to make complex musical relationships intuitive and easy to understand, moving beyond rote memorization.

**Highlights:** Visual music theory for guitar, piano, bass, and more, Color-based system for intuitive understanding, See scales, chords, modes, and intervals, Supports custom tunings and instruments, Extensive scale and mode library, Designed by a music educator

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $2.99 | per 7 days |
| Monthly Subscription | $10.99 | per month |
| Yearly Subscription | $49.99 | per year |
| Lifetime | $69.99 | one-time |


## Frequently asked questions

### Is Sonofield Ear Trainer free?

Sonofield Ear Trainer is free to download, with in-app purchases available.

### Is Interval Matrix Pro free?

Interval Matrix Pro is free to download, with in-app purchases available.

### Which has better reviews, Sonofield Ear Trainer or Interval Matrix Pro?

Interval Matrix Pro is rated higher. Sonofield Ear Trainer averages 4.9 out of 5 from 376 ratings, while Interval Matrix Pro averages 5.0 from 2 ratings.

### Do Sonofield Ear Trainer or Interval Matrix Pro have ads?

Neither Sonofield Ear Trainer nor Interval Matrix Pro shows ads.

### Which is updated more often, Sonofield Ear Trainer or Interval Matrix Pro?

Sonofield Ear Trainer ships an update every 9 days, and Interval Matrix Pro weekly. Most recently, Sonofield Ear Trainer was updated on October 14, 2026 and Interval Matrix Pro on October 1, 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.*