# Solo vs Sonofield Ear Trainer

The clearest difference is price: Sonofield Ear Trainer at Free against Solo's $17.99. Sonofield Ear Trainer also leads on update cadence (every 9 days vs monthly) and iOS requirement (13.0 vs 16.0). On rating, review sentiment, ratings volume and ads there is nothing between them.

Sonofield Ear Trainer is free to download; Solo costs $17.99 up front. Solo sells 2 one-off in-app purchases and Sonofield Ear Trainer sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Sonofield Ear Trainer holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 657 and 389 respectively. Written reviews point the same way: 83% of Solo's written reviews are positive against 89% of Sonofield Ear Trainer's.

Solo ships an update monthly, Sonofield Ear Trainer every 9 days. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Solo | Sonofield Ear Trainer |
| --- | --- | --- |
| Price | $17.99 | **Free** |
| Rating | [4.7 (657 ratings)](https://appshunter.io/ios/app/solo-fretboard-visualization/id1537057699/reviews) | **[4.9 (389 ratings)](https://appshunter.io/ios/app/sonofield-ear-trainer/id6740409139/reviews)** |
| Number of ratings | **657** | 389 |
| Positive reviews | 83.3% of reviews | **88.8% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 9 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 231 MB | 105 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Trio Software Ltd](https://appshunter.io/developer/1537057701) | [Sonofield Ear Trainer Education Ltd.](https://appshunter.io/developer/1789801335) |

## What reviewers say

### Solo

[App page](https://appshunter.io/ios/app/solo-fretboard-visualization/id1537057699)

Master your guitar fretboard with this interactive trainer. Learn note names, intervals, chord changes, and scales through guided exercises. Designed by professional guitarists, it offers customizable workouts for all skill levels.

**Highlights:** Fretboard visualization, Note name trainer, Interval shape memorization, Chord change outlining, Scale practice, Interactive fretboards, Customizable workouts

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Custom Tunings | $1.99 | one-time |
| Custom Chord Progressions | $5.99 | one-time |

**What reviewers like**

- 🚀 Excellent practice tool
- 👍 Helps improve fretboard knowledge
- 👍 Versatile and configurable
- 👍 Detailed video tutorials
- 👍 Accurate note detection

**What reviewers complain about**

- 🐛 Note detection issues
- 🐛 App crashes
- 🐛 Lack of customization options
- 🐛 Unintuitive for beginners
- 🐛 Limited functionality for the price

**Reported bugs**

- Crashes when launching the app
- Inconsistent note detection
- Inability to save progress or settings

**Requested features**

- Add ability to create custom chord progressions
- Integrate metronome functionality
- Provide visual representation of intervals on staff
- Add option to practice natural notes only
- Implement option to hear chord tones in the background


### 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


## Frequently asked questions

### Is Solo free?

Solo costs $17.99, and also offers in-app purchases.

### Is Sonofield Ear Trainer free?

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

### Which has better reviews, Solo or Sonofield Ear Trainer?

Sonofield Ear Trainer is rated higher. Solo averages 4.7 out of 5 from 657 ratings, while Sonofield Ear Trainer averages 4.9 from 389 ratings.

### Do Solo or Sonofield Ear Trainer have ads?

Neither Solo nor Sonofield Ear Trainer shows ads.

### Which is updated more often, Solo or Sonofield Ear Trainer?

Solo ships an update monthly, and Sonofield Ear Trainer every 9 days. Most recently, Solo was updated on October 27, 2026 and Sonofield Ear Trainer on October 28, 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.*