# ダイヤモンドZAi vs Speakify Reader

The clearest difference is in-app purchases: Speakify Reader at none against ダイヤモンドZAi's 4. Speakify Reader also leads on update cadence (monthly vs every 15 months). ダイヤモンドZAi's advantage is ads (none vs shown) and iOS requirement (9.0 vs 15.5). On price 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. Speakify Reader asks for nothing beyond the download.

ダイヤモンドZAi ships an update every 15 months, Speakify Reader monthly. The most recent releases landed on October 11, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | ダイヤモンドZAi | Speakify Reader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 15 months | **Monthly** |
| Size | 31 MB | 94 MB |
| Requires iOS | **9.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DIAMOND, Inc.](https://appshunter.io/developer/368890276) | [Doan Quoc Khanh](https://appshunter.io/developer/1830940590) |

## What reviewers say

### ダイヤモンドZAi

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

**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 |


### Speakify Reader

[App page](https://appshunter.io/ios/app/speakify-reader/id6761984045)

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

**In-app purchases:** none


## 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 Speakify Reader free?

Speakify Reader is free to download, with no in-app purchases.

### Do ダイヤモンドZAi or Speakify Reader have ads?

Speakify Reader shows ads; ダイヤモンドZAi does not.

### Which is updated more often, ダイヤモンドZAi or Speakify Reader?

ダイヤモンドZAi ships an update every 15 months, and Speakify Reader monthly. Most recently, ダイヤモンドZAi was updated on October 11, 2026 and Speakify Reader on October 1, 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.*