# Arithmetic Workbook DX vs Soroban66

The clearest difference is review sentiment: Soroban66 at 100% against Arithmetic Workbook DX's 14%. Soroban66 also leads on in-app purchases (none vs 11) and ads (none vs shown). Arithmetic Workbook DX's advantage is price (Free vs $3.99) and iOS requirement (13.0 vs 16.0). On update cadence and device support there is nothing between them.

Arithmetic Workbook DX is free to download; Soroban66 costs $3.99 up front. Arithmetic Workbook DX sells 11 one-off in-app purchases. Soroban66 asks for nothing beyond the download.

Arithmetic Workbook DX ships an update fortnightly, Soroban66 every 3 weeks. The most recent releases landed on August 13, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Arithmetic Workbook DX | Soroban66 |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Positive reviews | 14.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 52 MB | 29 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gloding Inc.](https://appshunter.io/developer/780228385) | [Masashi Fujishiro](https://appshunter.io/developer/1619460749) |

## 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 |


### Soroban66

[App page](https://appshunter.io/ios/app/soroban66/id1661734047)

Practice multiplication, division, and addition with customizable difficulty. Includes dictation exercises and a flash anzan mode for rapid calculation. Offers personalized routines and timed challenges.

**Highlights:** Multiplication and division practice, Customizable addition exercises, Number dictation for sums, Flash Anzan rapid calculation, Personalized routine creation, Timed challenges

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

**In-app purchases:** none


## Frequently asked questions

### Is Arithmetic Workbook DX free?

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

### Is Soroban66 free?

Soroban66 costs $3.99, with no in-app purchases.

### Do Arithmetic Workbook DX or Soroban66 have ads?

Arithmetic Workbook DX shows ads; Soroban66 does not.

### Which is updated more often, Arithmetic Workbook DX or Soroban66?

Arithmetic Workbook DX ships an update fortnightly, and Soroban66 every 3 weeks. Most recently, Arithmetic Workbook DX was updated on August 13, 2026 and Soroban66 on September 9, 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.*