# Libri 読書管理 vs Raikiri Viewer

The clearest difference is in-app purchases: Libri 読書管理 at none against Raikiri Viewer's 2. Raikiri Viewer's advantage is update cadence (every 2 days vs every 3 weeks) and iOS requirement (17.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Raikiri Viewer sells 2 in-app purchases, starting at $1.99 per month. Libri 読書管理 asks for nothing beyond the download.

Libri 読書管理 ships an update every 3 weeks, Raikiri Viewer every 2 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Libri 読書管理 | Raikiri Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Size | 75 MB | 11 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [BasaApp Technologies](https://appshunter.io/developer/1712971435) | [wataru takahashi](https://appshunter.io/developer/1896618750) |

## What reviewers say

### Libri 読書管理

[App page](https://appshunter.io/ios/app/libri/id6756832379)

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

**In-app purchases:** none


### Raikiri Viewer

[App page](https://appshunter.io/ios/app/raikiri-viewer/id6795181030)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Yearly | $17.99 | per year |


## Frequently asked questions

### Is Libri 読書管理 free?

Libri 読書管理 is free to download, with no in-app purchases.

### Is Raikiri Viewer free?

Raikiri Viewer is free to download, with in-app purchases available.

### Do Libri 読書管理 or Raikiri Viewer have ads?

Neither Libri 読書管理 nor Raikiri Viewer shows ads.

### Which is updated more often, Libri 読書管理 or Raikiri Viewer?

Libri 読書管理 ships an update every 3 weeks, and Raikiri Viewer every 2 days. Most recently, Libri 読書管理 was updated on October 24, 2026 and Raikiri Viewer on October 24, 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.*