# Mental Abacus Book 2 vs Foxar

The clearest difference is price: Foxar at Free against Mental Abacus Book 2's $8.99. Foxar also leads on update cadence (every 5 days vs every 13 months) and ratings volume (6 vs 1). Mental Abacus Book 2's advantage is in-app purchases (none vs 4) and iOS requirement (8.0 vs 26.4). On rating, ads and device support there is nothing between them.

Foxar is free to download; Mental Abacus Book 2 costs $8.99 up front. Foxar sells 4 in-app purchases, starting at $6.99 per month. Mental Abacus Book 2 asks for nothing beyond the download.

Mental Abacus Book 2 holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Foxar has 6 ratings behind it against 1, so its average is the more settled of the two.

Mental Abacus Book 2 ships an update every 13 months, Foxar every 5 days. The most recent releases landed on October 8, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Mental Abacus Book 2 | Foxar |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mental-abacus-book-2/id590626674/reviews)** | [4.8 (6 ratings)](https://appshunter.io/ios/app/foxar/id1524068804/reviews) |
| Number of ratings | 1 | **6** |
| Positive reviews | — | 74.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 5 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 16 MB | 97 MB |
| Requires iOS | **8.0** | 26.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Vision Pro |
| Age rating | 4+ | 4+ |
| Developer | [Hamster Force Multimedia Ltd.](https://appshunter.io/developer/443416476) | [Foxar](https://appshunter.io/developer/1330154768) |

## What reviewers say

### Mental Abacus Book 2

[App page](https://appshunter.io/ios/app/mental-abacus-book-2/id590626674)

This app provides a comprehensive guide to mastering multiplication and division using an abacus. It features detailed explanations, diagrams, and a virtual abacus for hands-on practice. An interactive tool demonstrates calculation steps for both hands.

**Highlights:** Advanced abacus multiplication and division concepts, Detailed explanations with diagrams and examples, Interactive Abaculator for step-by-step calculations, Virtual abacus for hands-on practice, Two hands fingering method for right brain development, Multiplicative pithy formulas for fast multiplication

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

**In-app purchases:** none


### Foxar

[App page](https://appshunter.io/ios/app/foxar/id1524068804)

Explore educational topics and the world around you with interactive visualizations. This app makes complex subjects like the solar system and human anatomy easy to understand for students and curious minds.

**Highlights:** Interactive learning modules, Explore the Solar System, Understand the human body, Learn about matter and sound, Visualize volcanoes, Suitable for elementary and middle school

**Features:** Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Foxar+ Monthly | $6.99 | per month |
| Foxar Pro Monthly | $6.99 | per month |
| Foxar+ Annual | $49.99 | per year |
| Foxar Pro Annual | $49.99 | per year |


## Frequently asked questions

### Is Mental Abacus Book 2 free?

Mental Abacus Book 2 costs $8.99, with no in-app purchases.

### Is Foxar free?

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

### Which has better reviews, Mental Abacus Book 2 or Foxar?

Mental Abacus Book 2 is rated higher. Mental Abacus Book 2 averages 5.0 out of 5 from 1 ratings, while Foxar averages 4.8 from 6 ratings.

### Do Mental Abacus Book 2 or Foxar have ads?

Neither Mental Abacus Book 2 nor Foxar shows ads.

### Which is updated more often, Mental Abacus Book 2 or Foxar?

Mental Abacus Book 2 ships an update every 13 months, and Foxar every 5 days. Most recently, Mental Abacus Book 2 was updated on October 8, 2026 and Foxar on October 29, 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.*