# TextbookDojo vs 赤シート暗記アプリ

The clearest difference is ads: 赤シート暗記アプリ at none against TextbookDojo's shown. TextbookDojo's advantage is update cadence (every 9 days vs every 16 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. TextbookDojo sells 3 in-app purchases, starting at $4.49 per month and 赤シート暗記アプリ sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

TextbookDojo ships an update every 9 days, 赤シート暗記アプリ every 16 months. The most recent releases landed on September 29, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | TextbookDojo | 赤シート暗記アプリ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 9 days** | Every 16 months |
| Size | 102 MB | 26 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ROBOBO, K.K.](https://appshunter.io/developer/1338822905) | [kotobaz](https://appshunter.io/developer/1634727152) |

## What reviewers say

### TextbookDojo

[App page](https://appshunter.io/ios/app/textbookdojo/id1338822906)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 month payment | $4.49 | per month |
| 1 year payment | $19.99 | per year |
| プレミアム年払い（期間限定特別価格） | $19.99 | per year |


### 赤シート暗記アプリ

[App page](https://appshunter.io/ios/app/pdf-akashi/id6468978321)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム月額プラン | $0.99 | per month |
| プレミアム3ヶ月プラン | $2.99 | per 3 months |
| プレミアム 6ヶ月プラン | $5.99 | per 6 months |
| PDF機能 | $0.99 | one-time |


## Frequently asked questions

### Is TextbookDojo free?

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

### Is 赤シート暗記アプリ free?

赤シート暗記アプリ is free to download, with in-app purchases available.

### Do TextbookDojo or 赤シート暗記アプリ have ads?

TextbookDojo shows ads; 赤シート暗記アプリ does not.

### Which is updated more often, TextbookDojo or 赤シート暗記アプリ?

TextbookDojo ships an update every 9 days, and 赤シート暗記アプリ every 16 months. Most recently, TextbookDojo was updated on September 29, 2026 and 赤シート暗記アプリ on October 7, 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.*