# Mathematical Quiz vs Cello Key

The clearest difference is review sentiment: Mathematical Quiz at 100% against Cello Key's 0%. Mathematical Quiz also leads on in-app purchases (none vs 1) and ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Cello Key sells 1 one-off in-app purchase. Mathematical Quiz asks for nothing beyond the download.

Mathematical Quiz ships an update monthly, Cello Key every 6 months. The most recent releases landed on October 12, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Mathematical Quiz | Cello Key |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.5 (2 ratings)](https://appshunter.io/ios/app/cello-key/id6449323913/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 6 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 7 MB | 61 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Avinash Meghanathi](https://appshunter.io/developer/889727647) | [Yuriko Kimura](https://appshunter.io/developer/1437608412) |

## What reviewers say

### Mathematical Quiz

[App page](https://appshunter.io/ios/app/mathematical-quiz/id6447247131)

This app offers a variety of logical and mathematical problems designed to enhance cognitive skills. It features puzzles suitable for all ages, aiming to improve concentration, memory, and problem-solving abilities through engaging brain exercises.

**Highlights:** Variety of logical problems, IQ level enhancement, Puzzles for kids and adults, Develops new intellectual pathways, Improves attention and concentration, Enhances memory and thinking skills

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

**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 Mathematical Quiz free?

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

### Is Cello Key free?

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

### Do Mathematical Quiz or Cello Key have ads?

Cello Key shows ads; Mathematical Quiz does not.

### Which is updated more often, Mathematical Quiz or Cello Key?

Mathematical Quiz ships an update monthly, and Cello Key every 6 months. Most recently, Mathematical Quiz was updated on October 12, 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.*