# ダイヤモンドZAi vs Book Notion｜notes reviews memo

The clearest difference is review sentiment: Book Notion｜notes reviews memo at 70% against ダイヤモンドZAi's 0%. Book Notion｜notes reviews memo also leads on monetization model (free with in-app purchases vs subscription) and update cadence (every 5 days vs every 15 months). ダイヤモンドZAi's advantage is iOS requirement (9.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. ダイヤモンドZAi sells 4 in-app purchases, starting at $7.49 per month and Book Notion｜notes reviews memo sells 6 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

ダイヤモンドZAi ships an update every 15 months, Book Notion｜notes reviews memo every 5 days. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | ダイヤモンドZAi | Book Notion｜notes reviews memo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/book-notionnotes-reviews-memo/id1619994087/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | 0.0% of reviews | **70.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 5 days** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 31 MB | 69 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | +4 |
| Developer | [DIAMOND, Inc.](https://appshunter.io/developer/368890276) | [Sho Kosaka](https://appshunter.io/developer/1533527261) |

## What reviewers say

### ダイヤモンドZAi

[App page](https://appshunter.io/ios/app/zai/id527508296)

This comprehensive money magazine covers investing, stocks, investment trusts, and FX for all generations. It provides easy-to-understand financial information in an engaging format. Digital editions may differ from print versions and may not include paper supplements.

**Highlights:** Comprehensive money magazine, Covers stocks, investment trusts, FX, Easy-to-understand financial information, Digital edition available, Subscription options, Automatic downloads

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ダイヤモンドZAi | $7.49 | per month |
| ダイヤモンドZAi | $21.49 | per 3 months |
| ダイヤモンドZAi | $37.99 | per 6 months |
| ダイヤモンドZAi | $76.99 | per year |


### Book Notion｜notes reviews memo

[App page](https://appshunter.io/ios/app/book-notionnotes-reviews-memo/id1619994087)

Easily save highlights from Kindle, web articles, and social media. Organize your reading with tags and comments, and get automatic reminders. Integrates with Notion for seamless note accumulation.

**Highlights:** Save Kindle highlights, Save web article highlights, Save X highlights, Add tags and comments, Notion integration, Automatic reminders, Searchable highlights

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Plan (Monthly) | $3.99 | per month |
| Premium Plan (Monthly) | $5.99 | per month |
| Z Plan (Monthly) | $7.99 | per month |
| Pro Plan (Yearly) | $39.99 | per year |
| Premium Plan (Yearly) | $59.99 | per year |
| Z Plan (Yearly) | $79.99 | per year |


## Frequently asked questions

### Is ダイヤモンドZAi free?

ダイヤモンドZAi is free to download, with in-app purchases available.

### Is Book Notion｜notes reviews memo free?

Book Notion｜notes reviews memo is free to download, with in-app purchases available.

### Do ダイヤモンドZAi or Book Notion｜notes reviews memo have ads?

Neither ダイヤモンドZAi nor Book Notion｜notes reviews memo shows ads.

### Which is updated more often, ダイヤモンドZAi or Book Notion｜notes reviews memo?

ダイヤモンドZAi ships an update every 15 months, and Book Notion｜notes reviews memo every 5 days. Most recently, ダイヤモンドZAi was updated on November 6, 2026 and Book Notion｜notes reviews memo on November 7, 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.*