# Arithmetic Workbook DX vs Brain Infinity

The clearest difference is ads: Brain Infinity at none against Arithmetic Workbook DX's shown. Brain Infinity also leads on update cadence (every 5 days vs fortnightly). Arithmetic Workbook DX's advantage is iOS requirement (13.0 vs 15.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Arithmetic Workbook DX sells 11 one-off in-app purchases and Brain Infinity sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Arithmetic Workbook DX ships an update fortnightly, Brain Infinity every 5 days. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Arithmetic Workbook DX | Brain Infinity |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 14.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 52 MB | 72 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gloding Inc.](https://appshunter.io/developer/780228385) | [YUTA UEDA](https://appshunter.io/developer/1853129120) |

## What reviewers say

### Arithmetic Workbook DX

[App page](https://appshunter.io/ios/app/arithmetic-workbook-dx/id780228382)

This app offers a structured arithmetic curriculum for elementary school students, covering six years of learning. It provides daily practice problems, tracks progress, and includes advanced questions to prepare for junior high entrance exams. It's also suitable for adults looking to sharpen their math skills.

**Highlights:** Daily arithmetic problems, Progress tracking and review, Junior high entrance exam preparation, Customizable school settings, Time limits and scoring system, Solutions for all units

**Features:** macOS Compatibility

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| わりざん レベル21~35 | $0.99 | one-time |
| 分数 レベル21~35 | $0.99 | one-time |
| 割合 レベル21~35 | $0.99 | one-time |
| 単位 レベル21~35 | $0.99 | one-time |
| 図形 レベル21~35 | $0.99 | one-time |
| 小数 レベル21~35 | $0.99 | one-time |
| 文章題 レベル21~35 | $0.99 | one-time |
| 比 レベル21~35 | $0.99 | one-time |
| 速さ レベル21~35 | $0.99 | one-time |
| 全単元 レベル6~20パック | $6.99 | one-time |
| 全単元 レベル21~35パック | $6.99 | one-time |


### Brain Infinity

[App page](https://appshunter.io/ios/app/brain-infinity-mind-workout/id6755319401)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Arithmetic Workbook DX free?

Arithmetic Workbook DX is free to download, with in-app purchases available.

### Is Brain Infinity free?

Brain Infinity is free to download, with in-app purchases available.

### Do Arithmetic Workbook DX or Brain Infinity have ads?

Arithmetic Workbook DX shows ads; Brain Infinity does not.

### Which is updated more often, Arithmetic Workbook DX or Brain Infinity?

Arithmetic Workbook DX ships an update fortnightly, and Brain Infinity every 5 days. Most recently, Arithmetic Workbook DX was updated on October 22, 2026 and Brain Infinity on October 24, 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.*