# 百人一首 簡単に暗記 vs Red Sheet

The clearest difference is in-app purchases: 百人一首 簡単に暗記 at none against Red Sheet's 9. Red Sheet's advantage is update cadence (every 3 days vs every 2 months) and review sentiment (78% vs 59%). On price, ads, monetization model 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. 百人一首 簡単に暗記 asks for nothing beyond the download.

百人一首 簡単に暗記 ships an update every 2 months, Red Sheet every 3 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | 百人一首 簡単に暗記 | Red Sheet |
| --- | --- | --- |
| 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 | 59.1% of reviews | **77.8% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 17 MB | 193 MB |
| Requires iOS | 14.2 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Rei Matsushita](https://appshunter.io/developer/595392937) | [Foodmenu.world Inc.](https://appshunter.io/developer/1438351063) |

## What reviewers say

### 百人一首 簡単に暗記

[App page](https://appshunter.io/ios/app/id1555049679)

This app helps you memorize the Hyakunin Isshu through customizable practice sessions. Choose specific poems, rules, or color sets for focused learning. It also includes a comprehensive review mode and reference materials.

**Highlights:** Customizable practice modes (range, rules, notation), Color-coded poem selection, Review of incorrect answers, Full Hyakunin Isshu review mode, Score saving and past error practice, Reference materials with readings and translations

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is 百人一首 簡単に暗記 free?

百人一首 簡単に暗記 is free to download, with no in-app purchases.

### Is Red Sheet free?

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

### Do 百人一首 簡単に暗記 or Red Sheet have ads?

Both 百人一首 簡単に暗記 and Red Sheet show ads.

### Which is updated more often, 百人一首 簡単に暗記 or Red Sheet?

百人一首 簡単に暗記 ships an update every 2 months, and Red Sheet every 3 days. Most recently, 百人一首 簡単に暗記 was updated on October 24, 2026 and Red Sheet on October 24, 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.*