# MentalCalculation & Abacus Pro vs 4 Mining

The clearest difference is price: 4 Mining at Free against MentalCalculation & Abacus Pro's $0.99. 4 Mining also leads on update cadence (every 3 days vs monthly). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

4 Mining is free to download; MentalCalculation & Abacus Pro costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

MentalCalculation & Abacus Pro ships an update monthly, 4 Mining every 3 days. The most recent releases landed on September 19, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | MentalCalculation & Abacus Pro | 4 Mining |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Every 3 days** |
| Monetization | Paid | — |
| Size | 144 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

### MentalCalculation & Abacus Pro

[App page](https://appshunter.io/ios/app/mentalcalculation-and-abacus-pro/id6474296462)

Engage in a fun and challenging mental calculation and abacus game. Practice with diverse questions and learn the abacus with an easy tutorial. This pro version offers an enhanced experience without frequent forced ads.

**Highlights:** Mental calculation practice, Abacus learning tutorial, Variety of practice questions, Pro version benefits, No forced ads

**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 MentalCalculation & Abacus Pro free?

MentalCalculation & Abacus Pro costs $0.99, with no in-app purchases.

### Is 4 Mining free?

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

### Do MentalCalculation & Abacus Pro or 4 Mining have ads?

Both MentalCalculation & Abacus Pro and 4 Mining show ads.

### Which is updated more often, MentalCalculation & Abacus Pro or 4 Mining?

MentalCalculation & Abacus Pro ships an update monthly, and 4 Mining every 3 days. Most recently, MentalCalculation & Abacus Pro was updated on September 19, 2026 and 4 Mining on September 26, 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.*