# SumXMinus vs 数学のべんきょう

The clearest difference is in-app purchases: SumXMinus at none against 数学のべんきょう's 1. 数学のべんきょう's advantage is update cadence (weekly vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 数学のべんきょう sells 1 one-off in-app purchase. SumXMinus asks for nothing beyond the download.

SumXMinus ships an update every 6 weeks, 数学のべんきょう weekly. The most recent releases landed on October 9, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | SumXMinus | 数学のべんきょう |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 6 weeks | **Weekly** |
| Size | 32 MB | 8 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Katsuhiko Yao](https://appshunter.io/developer/1543188534) | [Kinicy](https://appshunter.io/developer/366096366) |

## What reviewers say

### SumXMinus

[App page](https://appshunter.io/ios/app/sumxminus-negative-math/id6480327347)

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

**In-app purchases:** none


### 数学のべんきょう

[App page](https://appshunter.io/ios/app/id6785794903)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro（すべての形式） | $2.99 | one-time |


## Frequently asked questions

### Is SumXMinus free?

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

### Is 数学のべんきょう free?

数学のべんきょう is free to download, with in-app purchases available.

### Do SumXMinus or 数学のべんきょう have ads?

Both SumXMinus and 数学のべんきょう show ads.

### Which is updated more often, SumXMinus or 数学のべんきょう?

SumXMinus ships an update every 6 weeks, and 数学のべんきょう weekly. Most recently, SumXMinus was updated on October 9, 2026 and 数学のべんきょう on October 14, 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.*