# TextbookDojo vs RedSheetCamera

The clearest difference is ads: RedSheetCamera at none against TextbookDojo's shown. TextbookDojo's advantage is update cadence (every 9 days vs every 15 months) and device support (3 vs 1). On price and in-app purchases there is nothing between them.

Both are free to download. TextbookDojo sells 3 in-app purchases, starting at $4.49 per month and RedSheetCamera sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

TextbookDojo ships an update every 9 days, RedSheetCamera every 15 months. The most recent releases landed on June 1, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | TextbookDojo | RedSheetCamera |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 42.9% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 9 days** | Every 15 months |
| Monetization | — | Free with in-app purchases |
| Size | 102 MB | 9 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ROBOBO, K.K.](https://appshunter.io/developer/1338822905) | [taishin miyamoto](https://appshunter.io/developer/1570395608) |

## 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 |


### RedSheetCamera

[App page](https://appshunter.io/ios/app/redsheetcamera/id6451382182)

This study support app uses your camera to hide key information in your notes or textbooks. It then facilitates active recall practice to strengthen retention for exams, language learning, and certifications.

**Highlights:** Camera-based review of learning material, Adjustable information visibility, Uninterrupted study flow with simple controls, Supports consistent daily review, Active recall practice

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RedSheetCamera - Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is TextbookDojo free?

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

### Is RedSheetCamera free?

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

### Do TextbookDojo or RedSheetCamera have ads?

TextbookDojo shows ads; RedSheetCamera does not.

### Which is updated more often, TextbookDojo or RedSheetCamera?

TextbookDojo ships an update every 9 days, and RedSheetCamera every 15 months. Most recently, TextbookDojo was updated on June 1, 2026 and RedSheetCamera on September 10, 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.*