# Clef vs Clefs

The clearest difference is update cadence: Clef at every 3 days against Clefs's weekly. Clefs's advantage is iOS requirement (18.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Clef sells 2 one-off in-app purchases and Clefs sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Clef ships an update every 3 days, Clefs weekly. The most recent releases landed on October 10, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Clef | Clefs |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/clefs-note-reading-trainer/id6793227835/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Weekly |
| Monetization | — | Free with in-app purchases |
| Size | 67 MB | 25 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mel Owen](https://appshunter.io/developer/1674940249) | [Crazy Ootka Software AB](https://appshunter.io/developer/1440768352) |

## What reviewers say

### Clef

[App page](https://appshunter.io/ios/app/clef-sight-reading-trainer/id6768969191)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Clef | $9.99 | one-time |
| Clef Lifetime | $99.99 | one-time |


### 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 Clef free?

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

### Is Clefs free?

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

### Do Clef or Clefs have ads?

Neither Clef nor Clefs shows ads.

### Which is updated more often, Clef or Clefs?

Clef ships an update every 3 days, and Clefs weekly. Most recently, Clef was updated on October 10, 2026 and Clefs on October 4, 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.*