# Music Theory 101 vs Clefs

The clearest difference is in-app purchases: Music Theory 101 at none against Clefs's 1. Music Theory 101 also leads on ratings volume (70 vs 2) and iOS requirement (15.0 vs 18.0). Clefs's advantage is rating (5.0 vs 4.8). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Clefs sells 1 one-off in-app purchase. Music Theory 101 asks for nothing beyond the download.

Clefs holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Music Theory 101 has 70 ratings behind it against 2, so its average is the more settled of the two.

Music Theory 101 ships an update every 5 days, Clefs weekly. The most recent releases landed on October 22, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Music Theory 101 | Clefs |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (70 ratings)](https://appshunter.io/ios/app/music-theory-101-study-course/id1629995579/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/clefs-note-reading-trainer/id6793227835/reviews)** |
| Number of ratings | **70** | 2 |
| Positive reviews | 82.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Weekly |
| Monetization | **Free** | Free with in-app purchases |
| Size | 78 MB | 25 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Poesie Inc](https://appshunter.io/developer/1505664474) | [Crazy Ootka Software AB](https://appshunter.io/developer/1440768352) |

## What reviewers say

### Music Theory 101

[App page](https://appshunter.io/ios/app/music-theory-101-study-course/id1629995579)

An interactive music theory training app covering classical fundamentals. It features 19 units with audio, exercises, and definitions, mirroring AP Music Theory exam curriculum. Practice skills with over 90 exercise types.

**Highlights:** Interactive music theory course, 19 comprehensive units, Audio samples and key definitions, Skill practice exercises, AP Music Theory exam curriculum, Over 90 exercise types, Aural recognition and dictation

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

**In-app purchases:** none


### Clefs

[App page](https://appshunter.io/ios/app/clefs-note-reading-trainer/id6793227835)

Master sheet music reading with daily exercises and a guided course. This app helps you instantly recognize notes across all clefs, from beginner to advanced levels. Practice reading and writing notes, track your progress, and even connect a MIDI keyboard.

**Highlights:** Step-by-step guided course, Smart spaced review practice, Reading and writing drills, Support for all ten clefs, MIDI keyboard connectivity, Built-in music theory guide

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Clefs Premium | $6.99 | one-time |


## Frequently asked questions

### Is Music Theory 101 free?

Music Theory 101 is free to download, with no in-app purchases.

### Is Clefs free?

Clefs is free to download, with in-app purchases available.

### Which has better reviews, Music Theory 101 or Clefs?

Clefs is rated higher. Music Theory 101 averages 4.8 out of 5 from 70 ratings, while Clefs averages 5.0 from 2 ratings.

### Do Music Theory 101 or Clefs have ads?

Neither Music Theory 101 nor Clefs shows ads.

### Which is updated more often, Music Theory 101 or Clefs?

Music Theory 101 ships an update every 5 days, and Clefs weekly. Most recently, Music Theory 101 was updated on October 22, 2026 and Clefs on October 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.*