# i vs 暗記シート

The clearest difference is in-app purchases: 暗記シート at none against i's 10. 暗記シート also leads on iOS requirement (15.6 vs 18.0). i's advantage is update cadence (every 6 days vs every 2 months). On price, review sentiment, ads and monetization model there is nothing between them.

Both are free to download. i sells 10 one-off in-app purchases. 暗記シート asks for nothing beyond the download.

i ships an update every 6 days, 暗記シート every 2 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | i | 暗記シート |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (10 ratings)](https://appshunter.io/ios/app/i-memorize-sheet/id803026043/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 42.9% of reviews | **46.9% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 6 days** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 67 MB | 15 MB |
| Requires iOS | 18.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [BrainApp LLC](https://appshunter.io/developer/726018559) | [Shigeaki Harada](https://appshunter.io/developer/897400523) |

## What reviewers say

### i

[App page](https://appshunter.io/ios/app/i-memorize-sheet/id803026043)

This app allows users to hide text in study materials using a filter, mimicking a red sheet for effective memorization. It supports photos and PDFs, enabling studying anytime, anywhere with just a smartphone.

**Highlights:** Hide text with red filter effect, Study photos and PDFs, Add check marks for progress, Efficient study with navigation, Use anytime, anywhere

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| i-Memorize Sheet Remove ADs Option | $0.99 | one-time |
| imc00010 | $0.99 | one-time |
| imc00020 | $0.99 | one-time |
| i-Mem-Contents imc00030 | $0.99 | one-time |
| i-Mem-Contents imc00040 | $0.99 | one-time |
| i-Mem-Contents imc00010 | $0.99 | one-time |
| i-memorize Sheet File-Limit release add-on | $2.99 | one-time |
| i-memorize Sheet PDF page-Limit release add-on | $4.99 | one-time |
| Pro licence(campaign) | $5.99 | one-time |
| i-memorize Sheet Limit release add-on | $6.99 | one-time |


### 暗記シート

[App page](https://appshunter.io/ios/app/fight/id1233490505)

Create your own flashcards by masking text from photos or camera input. This free app helps you memorize information through repetition and focused study sessions. Save and organize your study materials with custom categories and notes.

**Highlights:** Create flashcards from photos/camera, Mask and reveal text for memorization, Adjustable sheet and pen properties, Unlimited file saving, Categorize and organize study files, iCloud Drive integration

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

**In-app purchases:** none


## Frequently asked questions

### Is i free?

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

### Is 暗記シート free?

暗記シート is free to download, with no in-app purchases.

### Do i or 暗記シート have ads?

Both i and 暗記シート show ads.

### Which is updated more often, i or 暗記シート?

i ships an update every 6 days, and 暗記シート every 2 months. Most recently, i was updated on October 26, 2026 and 暗記シート on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*