# Number Thumber vs Atom Learning

The clearest difference is in-app purchases: Atom Learning at none against Number Thumber's 2. Number Thumber's advantage is device support (4 vs 2) and iOS requirement (13.0 vs 17.0). On price, update cadence and ads there is nothing between them.

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

Number Thumber ships an update every 5 weeks, Atom Learning monthly. The most recent releases landed on October 19, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Number Thumber | Atom Learning |
| --- | --- | --- |
| 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 | — | 62.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 111 MB | 8 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Baibysoft Ltd](https://appshunter.io/developer/1862950062) | [Atom Learning Ltd](https://appshunter.io/developer/6775806717) |

## What reviewers say

### 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 |


### Atom Learning

[App page](https://appshunter.io/ios/app/atom-learning/id6795516508)

This platform offers personalized learning for children aged 7-16, covering maths, English, and reasoning. It adapts to individual progress, prepares for exams, and provides revision tools. Learning syncs across devices for continuous study.

**Highlights:** Adaptive learning across subjects, 11+ and entrance exam preparation, GCSE revision with mock tests, Personalized learning journeys, Progress tracking and rewards, Cross-device progress syncing

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

**In-app purchases:** none


## Frequently asked questions

### Is Number Thumber free?

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

### Is Atom Learning free?

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

### Do Number Thumber or Atom Learning have ads?

Neither Number Thumber nor Atom Learning shows ads.

### Which is updated more often, Number Thumber or Atom Learning?

Number Thumber ships an update every 5 weeks, and Atom Learning monthly. Most recently, Number Thumber was updated on October 19, 2026 and Atom Learning on October 18, 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.*