# Mental Abacus Book 2 vs Flash Mental Math

The clearest difference is price: Flash Mental Math at Free against Mental Abacus Book 2's $8.99. Flash Mental Math also leads on update cadence (every 3 months vs every 13 months) and ratings volume (19 vs 1). Mental Abacus Book 2's advantage is ads (none vs shown) and rating (5.0 vs 4.7). On in-app purchases and device support there is nothing between them.

Flash Mental Math is free to download; Mental Abacus Book 2 costs $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Mental Abacus Book 2 holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Flash Mental Math has 19 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, Flash Mental Math every 3 months. The most recent releases landed on October 8, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Mental Abacus Book 2 | Flash Mental Math |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mental-abacus-book-2/id590626674/reviews)** | [4.7 (19 ratings)](https://appshunter.io/ios/app/flash-mental-math-simple/id1547944841/reviews) |
| Number of ratings | 1 | **19** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 13 months | **Every 3 months** |
| Monetization | Paid | **Ad-supported** |
| Size | 16 MB | 14 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hamster Force Multimedia Ltd.](https://appshunter.io/developer/443416476) | [Ryouhei Azuma](https://appshunter.io/developer/1353297781) |

## 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


### Flash Mental Math

[App page](https://appshunter.io/ios/app/flash-mental-math-simple/id1547944841)

Practice mental arithmetic with various difficulty levels and custom modes. This app serves as a brain training tool to enhance calculation skills.

**Highlights:** Mental arithmetic practice, Easy, normal, and difficult modes, Customizable modes, Brain training, Calculation skill improvement

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

**In-app purchases:** none


## Frequently asked questions

### Is Mental Abacus Book 2 free?

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

### Is Flash Mental Math free?

Flash Mental Math is free to download, with no in-app purchases.

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

Mental Abacus Book 2 is rated higher. Mental Abacus Book 2 averages 5.0 out of 5 from 1 ratings, while Flash Mental Math averages 4.7 from 19 ratings.

### Do Mental Abacus Book 2 or Flash Mental Math have ads?

Flash Mental Math shows ads; Mental Abacus Book 2 does not.

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

Mental Abacus Book 2 ships an update every 13 months, and Flash Mental Math every 3 months. Most recently, Mental Abacus Book 2 was updated on October 8, 2026 and Flash Mental Math on October 25, 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.*