# 19×19 暗算脳トレ vs 日常計算

The clearest difference is in-app purchases: 19×19 暗算脳トレ at none against 日常計算's 2. 19×19 暗算脳トレ also leads on update cadence (every 9 days vs every 3 weeks) and iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. 日常計算 sells 2 in-app purchases, starting at $1.99 per month. 19×19 暗算脳トレ asks for nothing beyond the download.

19×19 暗算脳トレ ships an update every 9 days, 日常計算 every 3 weeks. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 19×19 暗算脳トレ | 日常計算 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 9 days** | Every 3 weeks |
| Size | 38 MB | 70 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Atsushi Isai](https://appshunter.io/developer/1881655484) | [SYSTEM TAMAYA](https://appshunter.io/developer/1847130603) |

## What reviewers say

### 19×19 暗算脳トレ

[App page](https://appshunter.io/ios/app/1919/id6763848289)

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

**In-app purchases:** none


### 日常計算

[App page](https://appshunter.io/ios/app/id6785873221)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム月額プラン | $1.99 | per month |
| 広告を削除 | $1.99 | one-time |


## Frequently asked questions

### Is 19×19 暗算脳トレ free?

19×19 暗算脳トレ is free to download, with no in-app purchases.

### Is 日常計算 free?

日常計算 is free to download, with in-app purchases available.

### Do 19×19 暗算脳トレ or 日常計算 have ads?

Both 19×19 暗算脳トレ and 日常計算 show ads.

### Which is updated more often, 19×19 暗算脳トレ or 日常計算?

19×19 暗算脳トレ ships an update every 9 days, and 日常計算 every 3 weeks. Most recently, 19×19 暗算脳トレ was updated on October 28, 2026 and 日常計算 on October 25, 2026.

---

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