# QB説明　１ねん　かずのセット vs Cello Key

The clearest difference is price: Cello Key at Free against QB説明　１ねん　かずのセット's $5.99. Cello Key also leads on update cadence (every 6 months vs every 33 months) and device support (3 vs 1). QB説明　１ねん　かずのセット's advantage is in-app purchases (none vs 1) and ads (none vs shown). On iOS requirement there is nothing between them.

Cello Key is free to download; QB説明　１ねん　かずのセット costs $5.99 up front. Cello Key sells 1 one-off in-app purchase. QB説明　１ねん　かずのセット asks for nothing beyond the download.

QB説明　１ねん　かずのセット ships an update every 33 months, Cello Key every 6 months. The most recent releases landed on September 19, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | QB説明　１ねん　かずのセット | Cello Key |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | — | **[3.5 (2 ratings)](https://appshunter.io/ios/app/cello-key/id6449323913/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 33 months | **Every 6 months** |
| Monetization | — | Free with in-app purchases |
| Size | 10 MB | 61 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Suzuki Educational Software Co.,Ltd.](https://appshunter.io/developer/585512975) | [Yuriko Kimura](https://appshunter.io/developer/1437608412) |

## What reviewers say

### QB説明　１ねん　かずのセット

[App page](https://appshunter.io/ios/app/qb/id605625842)

**In-app purchases:** none


### Cello Key

[App page](https://appshunter.io/ios/app/cello-key/id6449323913)

This app provides a simple fingerboard chart for cello learners, helping them identify notes, positions, and fingerings. It's designed for easy reference anywhere, especially useful for sheet music without finger numbers. It's particularly recommended for adult beginners.

**Highlights:** Fingerboard chart for cello, Note identification, Position guidance, Finger number reference, Simple and easy to read layout, Portable reference tool

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Natural Minor Scales Pack | $1.99 | one-time |


## Frequently asked questions

### Is QB説明　１ねん　かずのセット free?

QB説明　１ねん　かずのセット costs $5.99, with no in-app purchases.

### Is Cello Key free?

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

### Do QB説明　１ねん　かずのセット or Cello Key have ads?

Cello Key shows ads; QB説明　１ねん　かずのセット does not.

### Which is updated more often, QB説明　１ねん　かずのセット or Cello Key?

QB説明　１ねん　かずのセット ships an update every 33 months, and Cello Key every 6 months. Most recently, QB説明　１ねん　かずのセット was updated on September 19, 2026 and Cello Key on October 2, 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.*