# Red Sheet 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 Red Sheet's shown. Red Sheet's advantage is update cadence (every 3 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. Red Sheet sells 7 in-app purchases, starting at $2.99 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.

Red Sheet ships an update every 3 days, 赤シート暗記アプリ every 16 months. The most recent releases landed on October 20, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Red Sheet | 赤シート暗記アプリ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (5 ratings)](https://appshunter.io/ios/app/red-sheet-pdf-study-app/id1580506756/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 77.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 16 months |
| Monetization | Free with in-app purchases | — |
| Size | 193 MB | 26 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Foodmenu.world Inc.](https://appshunter.io/developer/1438351063) | [kotobaz](https://appshunter.io/developer/1634727152) |

## What reviewers say

### Red Sheet

[App page](https://appshunter.io/ios/app/red-sheet-pdf-study-app/id1580506756)

Create and study flashcards from your PDFs, notes, and images. This app lets you hide and reveal text to transform study materials into interactive flashcards for faster memorization. Supports various import options and flexible study tools.

**Highlights:** Create flashcards from PDFs, Import from note apps and cloud storage, Hide and reveal text for study, Create flashcards from photos and images, Vocabulary and word list flashcards, One-tap show/hide for quick review

**Features:** Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Special plan | $2.99 | per month |
| Monthly Super Saver Plan | $2.99 | per month |
| Monthly Value Plan | $3.99 | per month |
| Basic Plan | $5.99 | per month |
| 3 Month Plan - V 3.1.5 needed | $9.99 | per 3 months |
| Half year plan (Sale) | $17.99 | per 6 months |
| Half year plan - V2.9.0 needed | $22.99 | per 6 months |


### 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 Red Sheet free?

Red Sheet 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 Red Sheet or 赤シート暗記アプリ have ads?

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

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

Red Sheet ships an update every 3 days, and 赤シート暗記アプリ every 16 months. Most recently, Red Sheet was updated on October 20, 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.*