# ADOC vs 筆算ドリル Ext

The clearest difference is price: 筆算ドリル Ext at Free against ADOC's $29.99. 筆算ドリル Ext also leads on iOS requirement (9.3 vs 12.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

筆算ドリル Ext is free to download; ADOC costs $29.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ADOC ships an update every 2 months, 筆算ドリル Ext every 3 months. The most recent releases landed on September 13, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | ADOC | 筆算ドリル Ext |
| --- | --- | --- |
| Price | $29.99 | **Free** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | — | Free |
| Size | 28 MB | 27 MB |
| Requires iOS | 12.0 | **9.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kounosuke Tomori](https://appshunter.io/developer/1251823462) | [ryo itou](https://appshunter.io/developer/1435019729) |

## What reviewers say

### ADOC

[App page](https://appshunter.io/ios/app/adoc-s/id693966425)

**Features:** macOS Compatibility

**In-app purchases:** none


### 筆算ドリル Ext

[App page](https://appshunter.io/ios/app/ext/id1453815238)

This app helps users practice and learn written calculation methods for addition, subtraction, multiplication, and division. It offers a menu for endless practice, explanations of calculation methods, and 10-question tests. Users can customize the number of digits for calculations to match their skill level.

**Highlights:** Written calculation practice, Addition, subtraction, multiplication, division, Step-by-step explanations, 10-question tests, Customizable calculation digits, Skill-based difficulty

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

**In-app purchases:** none


## Frequently asked questions

### Is ADOC free?

ADOC costs $29.99, with no in-app purchases.

### Is 筆算ドリル Ext free?

筆算ドリル Ext is free to download, with no in-app purchases.

### Do ADOC or 筆算ドリル Ext have ads?

Neither ADOC nor 筆算ドリル Ext shows ads.

### Which is updated more often, ADOC or 筆算ドリル Ext?

ADOC ships an update every 2 months, and 筆算ドリル Ext every 3 months. Most recently, ADOC was updated on September 13, 2026 and 筆算ドリル Ext on September 20, 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.*