# Keysnake vs Number Thumber

The clearest difference is in-app purchases: Keysnake at none against Number Thumber's 2. Number Thumber's advantage is update cadence (every 5 weeks vs every 3 months) and iOS requirement (13.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Number Thumber sells 2 in-app purchases, starting at $1.99 per month. Keysnake asks for nothing beyond the download.

Keysnake ships an update every 3 months, Number Thumber every 5 weeks. The most recent releases landed on September 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Keysnake | Number Thumber |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/number-thumber-mental-math/id6756803242/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 64 MB | 111 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Keysnake Ltd](https://appshunter.io/developer/1786774245) | [Baibysoft Ltd](https://appshunter.io/developer/1862950062) |

## What reviewers say

### Keysnake

[App page](https://appshunter.io/ios/app/keysnake/id6739732166)

This app guides you through learning piano using visual cues on your keyboard. Follow illuminated keys and spoken instructions to play songs at your own pace. It offers timed challenges and adaptive learning for all skill levels.

**Highlights:** Spoken guidance for notes and fingerings, LED light-up key indicators, Timed skill challenges, Adaptive learning system, Song library across genres, Real-time performance feedback

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

**In-app purchases:** none


### Number Thumber

[App page](https://appshunter.io/ios/app/number-thumber-mental-math/id6756803242)

Sharpen your mental math skills with this engaging game. Fill in missing digits in arithmetic expressions within a time limit. Customize problem types and operations to create a personalized learning experience.

**Highlights:** Fill in missing digits in arithmetic expressions, Timed challenges with progress bar, Customizable problem types and operations, Support for addition, subtraction, multiplication, and division, Adjustable difficulty with fractions and negative terms, Score-based time allocation

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Number Thumber monthly | $1.99 | per month |
| NT School Trial 1m | $0.99 | one-time |


## Frequently asked questions

### Is Keysnake free?

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

### Is Number Thumber free?

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

### Do Keysnake or Number Thumber have ads?

Neither Keysnake nor Number Thumber shows ads.

### Which is updated more often, Keysnake or Number Thumber?

Keysnake ships an update every 3 months, and Number Thumber every 5 weeks. Most recently, Keysnake was updated on September 24, 2026 and Number Thumber on October 19, 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.*