# TextbookDojo vs スマホで赤シート

The clearest difference is in-app purchases: スマホで赤シート at none against TextbookDojo's 3. スマホで赤シート also leads on ads (none vs shown) and update cadence (daily vs every 9 days). TextbookDojo's advantage is iOS requirement (14.0 vs 17.0). On price and device support there is nothing between them.

Both are free to download. TextbookDojo sells 3 in-app purchases, starting at $4.49 per month. スマホで赤シート asks for nothing beyond the download.

TextbookDojo ships an update every 9 days, スマホで赤シート daily. The most recent releases landed on September 29, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | TextbookDojo | スマホで赤シート |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Daily** |
| Size | 102 MB | 3 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ROBOBO, K.K.](https://appshunter.io/developer/1338822905) | [Keisuke Shibata](https://appshunter.io/developer/1791551970) |

## 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 |


### スマホで赤シート

[App page](https://appshunter.io/ios/app/id6468587251)

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

**In-app purchases:** none


## Frequently asked questions

### Is TextbookDojo free?

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

### Is スマホで赤シート free?

スマホで赤シート is free to download, with no in-app purchases.

### Do TextbookDojo or スマホで赤シート have ads?

TextbookDojo shows ads; スマホで赤シート does not.

### Which is updated more often, TextbookDojo or スマホで赤シート?

TextbookDojo ships an update every 9 days, and スマホで赤シート daily. Most recently, TextbookDojo was updated on September 29, 2026 and スマホで赤シート on October 14, 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.*