# Mental Calculation & Abacus vs 4 Mining

The clearest difference is update cadence: 4 Mining at every 3 days against Mental Calculation & Abacus's every 6 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Mental Calculation & Abacus ships an update every 6 months, 4 Mining every 3 days. The most recent releases landed on October 16, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Mental Calculation & Abacus | 4 Mining |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/mental-calculation-and-abacus/id1582407909/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 6 months | **Every 3 days** |
| Monetization | Ad-supported | — |
| Size | 143 MB | 102 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Park Jisang](https://appshunter.io/developer/995438886) | [FROMTHERED](https://appshunter.io/developer/1646382595) |

## What reviewers say

### Mental Calculation & Abacus

[App page](https://appshunter.io/ios/app/mental-calculation-and-abacus/id1582407909)

Engage in a fun and educational game designed to enhance mental calculation skills. Learn to use an abacus with an easy-to-follow tutorial and practice with diverse question types.

**Highlights:** Mental calculation practice, Abacus learning tutorial, Variety of practice questions, Suitable for all ages

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

**In-app purchases:** none


### 4 Mining

[App page](https://appshunter.io/ios/app/4-mining/id6739566263)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mental Calculation & Abacus free?

Mental Calculation & Abacus is free to download, with no in-app purchases.

### Is 4 Mining free?

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

### Do Mental Calculation & Abacus or 4 Mining have ads?

Both Mental Calculation & Abacus and 4 Mining show ads.

### Which is updated more often, Mental Calculation & Abacus or 4 Mining?

Mental Calculation & Abacus ships an update every 6 months, and 4 Mining every 3 days. Most recently, Mental Calculation & Abacus was updated on October 16, 2026 and 4 Mining on October 12, 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.*