# かけ算訓練 vs 暗算Blitz

The clearest difference is in-app purchases: かけ算訓練 at none against 暗算Blitz's 1. かけ算訓練 also leads on ads (none vs shown) and iOS requirement (13.0 vs 17.6). 暗算Blitz's advantage is update cadence (daily vs every 9 days). On price and device support there is nothing between them.

Both are free to download. 暗算Blitz sells 1 one-off in-app purchase. かけ算訓練 asks for nothing beyond the download.

かけ算訓練 ships an update every 9 days, 暗算Blitz daily. The most recent releases landed on October 5, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | かけ算訓練 | 暗算Blitz |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 days | **Daily** |
| Size | 14 MB | 54 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shotaro Maruyama](https://appshunter.io/developer/1534491883) | [Toshihide KAWAI](https://appshunter.io/developer/1598098272) |

## What reviewers say

### かけ算訓練

[App page](https://appshunter.io/ios/app/id1534491881)

**In-app purchases:** none


### 暗算Blitz

[App page](https://appshunter.io/ios/app/blitz/id6741730652)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム・ユーザー | $14.99 | one-time |


## Frequently asked questions

### Is かけ算訓練 free?

かけ算訓練 is free to download, with no in-app purchases.

### Is 暗算Blitz free?

暗算Blitz is free to download, with in-app purchases available.

### Do かけ算訓練 or 暗算Blitz have ads?

暗算Blitz shows ads; かけ算訓練 does not.

### Which is updated more often, かけ算訓練 or 暗算Blitz?

かけ算訓練 ships an update every 9 days, and 暗算Blitz daily. Most recently, かけ算訓練 was updated on October 5, 2026 and 暗算Blitz on October 3, 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.*