# Mental Abacus vs Anzan19x19

The clearest difference is price: Anzan19x19 at Free against Mental Abacus's $8.99. Anzan19x19 also leads on update cadence (every 3 days vs every 13 months) and iOS requirement (12.0 vs 15.0). Mental Abacus's advantage is ads (none vs shown). On in-app purchases and device support there is nothing between them.

Anzan19x19 is free to download; Mental Abacus costs $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Mental Abacus ships an update every 13 months, Anzan19x19 every 3 days. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Mental Abacus | Anzan19x19 |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| Rating | **[3.9 (7 ratings)](https://appshunter.io/ios/app/mental-abacus/id489127101/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 13 months | **Every 3 days** |
| Monetization | Paid | — |
| Size | 17 MB | 38 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hamster Force Multimedia Ltd.](https://appshunter.io/developer/443416476) | [Hajime Hotaka](https://appshunter.io/developer/1495063369) |

## What reviewers say

### Mental Abacus

[App page](https://appshunter.io/ios/app/mental-abacus/id489127101)

Master abacus mental arithmetic with illustrated tutorials and a step-by-step demonstrator. Practice calculations on a virtual abacus and learn the two-hands fingering method to enhance right brain functions. Ideal for self-learning addition and subtraction.

**Highlights:** Illustrated tutorials, Step-by-step demonstrator, Virtual abacus practice, Two hands fingering method, Addition and subtraction, Rapid calculation exercises

**Features:** Vision Pro support

**In-app purchases:** none


### Anzan19x19

[App page](https://appshunter.io/ios/app/anzan19x19/id1495063370)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mental Abacus free?

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

### Is Anzan19x19 free?

Anzan19x19 is free to download, with no in-app purchases.

### Do Mental Abacus or Anzan19x19 have ads?

Anzan19x19 shows ads; Mental Abacus does not.

### Which is updated more often, Mental Abacus or Anzan19x19?

Mental Abacus ships an update every 13 months, and Anzan19x19 every 3 days. Most recently, Mental Abacus was updated on November 1, 2026 and Anzan19x19 on November 7, 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.*