# Red Sheet 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 Red Sheet's 9. スマホで赤シート also leads on ads (none vs shown) and update cadence (daily vs every 3 days). Red Sheet's advantage is device support (4 vs 2) and iOS requirement (13.0 vs 17.0). On price there is nothing between them.

Both are free to download. Red Sheet sells 7 in-app purchases, starting at $2.99 per month. スマホで赤シート asks for nothing beyond the download.

Red Sheet ships an update every 3 days, スマホで赤シート daily. The most recent releases landed on October 12, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Red Sheet | スマホで赤シート |
| --- | --- | --- |
| 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 | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 days | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 193 MB | 3 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Foodmenu.world Inc.](https://appshunter.io/developer/1438351063) | [Keisuke Shibata](https://appshunter.io/developer/1791551970) |

## 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 |


### 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 Red Sheet free?

Red Sheet 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 Red Sheet or スマホで赤シート have ads?

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

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

Red Sheet ships an update every 3 days, and スマホで赤シート daily. Most recently, Red Sheet was updated on October 12, 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.*