# Clefs vs ViolinFlex

The clearest difference is in-app purchases: ViolinFlex at none against Clefs's 1. ViolinFlex also leads on update cadence (every 3 days vs weekly) and iOS requirement (15.0 vs 18.0). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Clefs against 5.0 for ViolinFlex. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

Clefs ships an update weekly, ViolinFlex every 3 days. The most recent releases landed on October 4, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Clefs | ViolinFlex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/clefs-note-reading-trainer/id6793227835/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/violinflex/id6796409726/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 25 MB | 1 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Crazy Ootka Software AB](https://appshunter.io/developer/1440768352) | [Music Flex Technology LLC](https://appshunter.io/developer/6796409728) |

## What reviewers say

### 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 |


### ViolinFlex

[App page](https://appshunter.io/ios/app/violinflex/id6796409726)

This game helps young violinists learn note identification and finger placement. It offers solo practice and competitive modes, reinforcing learning through repetition and visual cues. Designed for beginners, it focuses on essential first-position notes.

**Highlights:** Note identification on treble clef, String and finger placement guidance, Repetitive practice for mastery, Solo practice mode, 2-player competitive mode, Color-coded finger system, Focus on first position and natural notes

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

**In-app purchases:** none


## Frequently asked questions

### Is Clefs free?

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

### Is ViolinFlex free?

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

### Which has better reviews, Clefs or ViolinFlex?

Clefs and ViolinFlex are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.

### Do Clefs or ViolinFlex have ads?

Neither Clefs nor ViolinFlex shows ads.

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

Clefs ships an update weekly, and ViolinFlex every 3 days. Most recently, Clefs was updated on October 4, 2026 and ViolinFlex on October 11, 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.*