# OnKey Lite vs Sonofield Ear Trainer

The clearest difference is in-app purchases: OnKey Lite at none against Sonofield Ear Trainer's 5. OnKey Lite also leads on review sentiment (100% vs 89%). Sonofield Ear Trainer's advantage is update cadence (every 9 days vs every 3 months) and rating (4.9 vs 4.5). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Sonofield Ear Trainer sells 4 one-off in-app purchases. OnKey Lite asks for nothing beyond the download.

Sonofield Ear Trainer holds the better App Store score, 4.9 against 4.5. That said, the two scores are not equally well evidenced: Sonofield Ear Trainer has 392 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 100% of OnKey Lite's written reviews are positive against 89% of Sonofield Ear Trainer's, so the app with the better star average is not the one people write more warmly about.

OnKey Lite ships an update every 3 months, Sonofield Ear Trainer every 9 days. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | OnKey Lite | Sonofield Ear Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/onkey-lite-scale-practice/id1638630839/reviews) | **[4.9 (392 ratings)](https://appshunter.io/ios/app/sonofield-ear-trainer/id6740409139/reviews)** |
| Number of ratings | 2 | **392** |
| Positive reviews | **100.0% of reviews** | 88.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 9 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 105 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rea Meir](https://appshunter.io/developer/1638204694) | [Sonofield Ear Trainer Education Ltd.](https://appshunter.io/developer/1789801335) |

## What reviewers say

### OnKey Lite

[App page](https://appshunter.io/ios/app/onkey-lite-scale-practice/id1638630839)

This app generates readable, note-based exercises for practicing musical scales and chords. It's ideal for warm-ups, technique drills, or theory work, catering to musicians of all levels. Customize your practice with various patterns, keys, and note name options.

**Highlights:** Generate note-based exercises, Practice scales and chords, Transpose to any key, Set range and clef, Choose from various patterns, Add note names and time signatures

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

**In-app purchases:** none


### 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 OnKey Lite free?

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

### Is Sonofield Ear Trainer free?

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

### Which has better reviews, OnKey Lite or Sonofield Ear Trainer?

Sonofield Ear Trainer is rated higher. OnKey Lite averages 4.5 out of 5 from 2 ratings, while Sonofield Ear Trainer averages 4.9 from 392 ratings.

### Do OnKey Lite or Sonofield Ear Trainer have ads?

Neither OnKey Lite nor Sonofield Ear Trainer shows ads.

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

OnKey Lite ships an update every 3 months, and Sonofield Ear Trainer every 9 days. Most recently, OnKey Lite was updated on November 3, 2026 and Sonofield Ear Trainer on November 8, 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.*