# 鬼計算 vs Four Operations Math

The clearest difference is ads: Four Operations Math at none against 鬼計算's shown. Four Operations Math also leads on update cadence (every 8 days vs every 5 months). 鬼計算's advantage is iOS requirement (15.2 vs 17.0). On price, 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.

鬼計算 ships an update every 5 months, Four Operations Math every 8 days. The most recent releases landed on October 8, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | 鬼計算 | Four Operations Math |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/four-operations-math/id6529530666/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 8 days** |
| Monetization | — | Free |
| Size | 12 MB | 21 MB |
| Requires iOS | **15.2** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [masaaki genno](https://appshunter.io/developer/1611455396) | [Romiick LLC](https://appshunter.io/developer/1716146475) |

## What reviewers say

### 鬼計算

[App page](https://appshunter.io/ios/app/hp/id1613670633)

**Features:** macOS Compatibility

**In-app purchases:** none


### Four Operations Math

[App page](https://appshunter.io/ios/app/four-operations-math/id6529530666)

This puzzle game challenges players to create mathematical equations using four numbers and basic arithmetic operations to reach a target value. It promotes logical thinking and problem-solving skills through engaging gameplay with varying challenges.

**Highlights:** Create mathematical equations, Use four numbers and operations, Achieve target values, Logical thinking development, Basic and Custom game modes, Intuitive tap and drag controls

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

**In-app purchases:** none


## Frequently asked questions

### Is 鬼計算 free?

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

### Is Four Operations Math free?

Four Operations Math is free to download, with no in-app purchases.

### Do 鬼計算 or Four Operations Math have ads?

鬼計算 shows ads; Four Operations Math does not.

### Which is updated more often, 鬼計算 or Four Operations Math?

鬼計算 ships an update every 5 months, and Four Operations Math every 8 days. Most recently, 鬼計算 was updated on October 8, 2026 and Four Operations Math on October 6, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*