# N'Back vs AI作文メーカー：完全オリジナル作文を３０秒で生成

The clearest difference is review sentiment: N'Back at 70% against AI作文メーカー：完全オリジナル作文を３０秒で生成's 33%. AI作文メーカー：完全オリジナル作文を３０秒で生成's advantage is ads (none vs shown). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. N'Back sells 1 one-off in-app purchase and AI作文メーカー：完全オリジナル作文を３０秒で生成 sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

N'Back ships an update every 9 months, AI作文メーカー：完全オリジナル作文を３０秒で生成 every 8 months. The most recent releases landed on September 11, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | N'Back | AI作文メーカー：完全オリジナル作文を３０秒で生成 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/nback/id591320567/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | **70.0% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Every 8 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 6 MB | 12 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) | [reiko hori](https://appshunter.io/developer/1777370692) |

## What reviewers say

### N'Back

[App page](https://appshunter.io/ios/app/nback/id591320567)

Enhance sensory and working memory with this brain training application. It offers various modes to test your ability to recall sequences of numbers, progressing through different 'N' levels.

**Highlights:** Sensory memory improvement, Working memory enhancement, N'Back exercises, Flash Mode, Slow Mode, Step Mode

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add Levels (3'Back-10'Back) and Remove Ads | $2.99 | one-time |


### AI作文メーカー：完全オリジナル作文を３０秒で生成

[App page](https://appshunter.io/ios/app/ai/id6738920715)

Generate original essays in 30 seconds with this AI-powered writing assistant. Tailor content by grade level and keywords for personalized compositions. Ideal for students, parents, and writers seeking quick creative support.

**Highlights:** 30-second essay generation, Grade-level optimization, Keyword-based content creation, Essay editing and refinement, Original composition generation

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 5ポイントパック | $1.99 | one-time |
| 10ポイントパック | $2.99 | one-time |
| 30ポイントパック | $6.99 | one-time |
| 50ポイントパック | $11.99 | one-time |


## Frequently asked questions

### Is N'Back free?

N'Back is free to download, with in-app purchases available.

### Is AI作文メーカー：完全オリジナル作文を３０秒で生成 free?

AI作文メーカー：完全オリジナル作文を３０秒で生成 is free to download, with in-app purchases available.

### Do N'Back or AI作文メーカー：完全オリジナル作文を３０秒で生成 have ads?

N'Back shows ads; AI作文メーカー：完全オリジナル作文を３０秒で生成 does not.

### Which is updated more often, N'Back or AI作文メーカー：完全オリジナル作文を３０秒で生成?

N'Back ships an update every 9 months, and AI作文メーカー：完全オリジナル作文を３０秒で生成 every 8 months. Most recently, N'Back was updated on September 11, 2026 and AI作文メーカー：完全オリジナル作文を３０秒で生成 on June 4, 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.*