# Hearing PRO vs Keys Trainer

The clearest difference is rating: Keys Trainer at 5.0 against Hearing PRO's 3.9. Keys Trainer also leads on update cadence (every 9 months vs every 32 months). Hearing PRO's advantage is review sentiment (21% vs 0%) and ratings volume (21 vs 2). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Hearing PRO costs $1.99 and Keys Trainer $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Keys Trainer holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Hearing PRO has 21 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 21% of Hearing PRO's written reviews are positive against 0% of Keys Trainer's, so the app with the better star average is not the one people write more warmly about.

Hearing PRO ships an update every 32 months, Keys Trainer every 9 months. The most recent releases landed on September 17, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Hearing PRO | Keys Trainer |
| --- | --- | --- |
| Price | **$1.99** | $2.99 |
| Rating | [3.9 (21 ratings)](https://appshunter.io/ios/app/hearing-proear-trainingnotes/id1485053382/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/keys-trainer/id1525979034/reviews)** |
| Number of ratings | **21** | 2 |
| Positive reviews | **21.1% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 32 months | **Every 9 months** |
| Monetization | **Free** | Paid |
| Size | 68 MB | 30 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dmitry Zaika](https://appshunter.io/developer/1326165516) | [Plearn LLC](https://appshunter.io/developer/6792172523) |

## What reviewers say

### Hearing PRO

[App page](https://appshunter.io/ios/app/hearing-proear-trainingnotes/id1485053382)

Develop your musical ear with a variety of exercises. Practice melodic dictations, learn to read music notes, and train your vocal pitch. Supports multiple instruments and musical notation systems.

**Highlights:** Melodic dictation practice, Music note reading training, Vocal pitch training, Supports multiple instruments, Multiple musical notation systems

**Features:** macOS Compatibility

**In-app purchases:** none


### Keys Trainer

[App page](https://appshunter.io/ios/app/keys-trainer/id1525979034)

Master key signatures and scales with this music learning app. Practice identifying keys, understanding note sharps/flats, and instantly recognizing scale layouts on a keyboard. Features include customizable practice, passive viewing, and a challenging game mode.

**Highlights:** Key signature recognition, Scale layout identification, Customizable learning range, Intelligent training based on performance, Practice, View, Game, and Search modes, Earn coins, medals, and trophies

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

**In-app purchases:** none


## Frequently asked questions

### Is Hearing PRO free?

Hearing PRO costs $1.99, with no in-app purchases.

### Is Keys Trainer free?

Keys Trainer costs $2.99, with no in-app purchases.

### Which has better reviews, Hearing PRO or Keys Trainer?

Keys Trainer is rated higher. Hearing PRO averages 3.9 out of 5 from 21 ratings, while Keys Trainer averages 5.0 from 2 ratings.

### Do Hearing PRO or Keys Trainer have ads?

Neither Hearing PRO nor Keys Trainer shows ads.

### Which is updated more often, Hearing PRO or Keys Trainer?

Hearing PRO ships an update every 32 months, and Keys Trainer every 9 months. Most recently, Hearing PRO was updated on September 17, 2026 and Keys Trainer on September 21, 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.*