# ダイヤモンドZAi vs Yom! Aozora Bunko

The clearest difference is review sentiment: Yom! Aozora Bunko at 68% against ダイヤモンドZAi's 0%. Yom! Aozora Bunko also leads on monetization model (free with in-app purchases vs subscription) and update cadence (every 9 days vs every 15 months). ダイヤモンドZAi's advantage is ads (none vs shown) and iOS requirement (9.0 vs 15.0). On price, 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 Yom! Aozora Bunko sells 1 in-app purchase, starting at $0.99 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, Yom! Aozora Bunko every 9 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 | Yom! Aozora Bunko |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/yom-aozora-bunko/id1530145482/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | **68.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 15 months | **Every 9 days** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 31 MB | 94 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DIAMOND, Inc.](https://appshunter.io/developer/368890276) | [Seiichirou Tanaka](https://appshunter.io/developer/673085302) |

## 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 |


### Yom! Aozora Bunko

[App page](https://appshunter.io/ios/app/yom-aozora-bunko/id1530145482)

Access and read over 17,000 literary classics from Aozora Bunko for free. Customize your reading experience with adjustable display settings, bookmarks, and search functions. An optional premium plan offers an ad-free experience.

**Highlights:** Read 17,000+ literary classics, Customizable display (font, spacing, margins), Vertical and horizontal text options, Bookmarks and favorites, Work, author, and category search, Page count indicator, Ad-free premium option

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan | $0.99 | per month |


## 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 Yom! Aozora Bunko free?

Yom! Aozora Bunko is free to download, with in-app purchases available.

### Do ダイヤモンドZAi or Yom! Aozora Bunko have ads?

Yom! Aozora Bunko shows ads; ダイヤモンドZAi does not.

### Which is updated more often, ダイヤモンドZAi or Yom! Aozora Bunko?

ダイヤモンドZAi ships an update every 15 months, and Yom! Aozora Bunko every 9 days. Most recently, ダイヤモンドZAi was updated on November 6, 2026 and Yom! Aozora Bunko 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.*