# Music Theory Advanced vs Keys Trainer

The clearest difference is price: Keys Trainer at $2.99 against Music Theory Advanced's $4.99. Keys Trainer also leads on device support (3 vs 1) and iOS requirement (12.0 vs 26.0). On update cadence, ads and in-app purchases there is nothing between them.

Music Theory Advanced costs $4.99 and Keys Trainer $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Music Theory Advanced ships an update every 18 months, Keys Trainer every 9 months. The most recent releases landed on October 18, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Music Theory Advanced | Keys Trainer |
| --- | --- | --- |
| Price | $4.99 | **$2.99** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/keys-trainer/id1525979034/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 9 months** |
| Monetization | — | Paid |
| Size | 48 MB | 30 MB |
| Requires iOS | 26.0 | **12.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Patrick Q. Kelly](https://appshunter.io/developer/310068987) | [Plearn LLC](https://appshunter.io/developer/6792172523) |

## What reviewers say

### Music Theory Advanced

[App page](https://appshunter.io/ios/app/music-theory-advanced/id511632736)

**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 Music Theory Advanced free?

Music Theory Advanced costs $4.99, with no in-app purchases.

### Is Keys Trainer free?

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

### Do Music Theory Advanced or Keys Trainer have ads?

Neither Music Theory Advanced nor Keys Trainer shows ads.

### Which is updated more often, Music Theory Advanced or Keys Trainer?

Music Theory Advanced ships an update every 18 months, and Keys Trainer every 9 months. Most recently, Music Theory Advanced was updated on October 18, 2026 and Keys Trainer on October 22, 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.*