# Memora X 世界史一問一答 vs AI Note

The clearest difference is ads: AI Note at none against Memora X 世界史一問一答's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Memora X 世界史一問一答 sells 1 one-off in-app purchase and AI Note sells 3 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

Memora X 世界史一問一答 ships an update every 5 days, AI Note weekly. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Memora X 世界史一問一答 | AI Note |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Weekly |
| Monetization | Free with in-app purchases | — |
| Size | 21 MB | 3 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Issei Sato](https://appshunter.io/developer/6791698667) | [hiroyuki matsuzaki](https://appshunter.io/developer/1867154216) |

## What reviewers say

### Memora X 世界史一問一答

[App page](https://appshunter.io/ios/app/memora-x/id6807089001)

This app helps students prepare for university entrance exams by offering a vast collection of world history questions covering 20 years of past papers. It uses a spaced repetition system to aid memorization and allows users to learn through various question formats.

**Highlights:** 20 years of past exam questions, 4,853 Q&A, 250 timeline, 477 essay questions, Three difficulty levels, Four learning modes: horizontal, vertical, timeline, essay, Spaced repetition system, Swipe-based interface, Customizable 'my vocabulary book'

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プラチナMAX会員（買い切り） | $5.99 | one-time |


### AI Note

[App page](https://appshunter.io/ios/app/ai-note/id6808557580)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro 月額 | $5.99 | per month |
| Pro 年額 | $49.99 | per year |
| 自分のキーで使う | $19.99 | one-time |


## Frequently asked questions

### Is Memora X 世界史一問一答 free?

Memora X 世界史一問一答 is free to download, with in-app purchases available.

### Is AI Note free?

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

### Do Memora X 世界史一問一答 or AI Note have ads?

Memora X 世界史一問一答 shows ads; AI Note does not.

### Which is updated more often, Memora X 世界史一問一答 or AI Note?

Memora X 世界史一問一答 ships an update every 5 days, and AI Note weekly. Most recently, Memora X 世界史一問一答 was updated on November 6, 2026 and AI Note on October 31, 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.*