# i読書 vs 読書尚友

The clearest difference is rating: 読書尚友 at 4.0 against i読書's 3.0. 読書尚友 also leads on update cadence (every 2 weeks vs every 2 months). i読書's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, review sentiment and device support there is nothing between them.

Both are free to download. 読書尚友 sells 1 one-off in-app purchase. i読書 asks for nothing beyond the download.

読書尚友 holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews split almost evenly too, at 50% and 50% positive.

i読書 ships an update every 2 months, 読書尚友 every 2 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | i読書 | 読書尚友 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (3 ratings)](https://appshunter.io/ios/app/i/id534970999/reviews) | **[4.0 (1 ratings)](https://appshunter.io/ios/app/id1579254502/reviews)** |
| Number of ratings | **3** | 1 |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 19 MB | 45 MB |
| Requires iOS | **7.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [yaslab](https://appshunter.io/developer/534971002) | [hishida](https://appshunter.io/developer/314082596) |

## What reviewers say

### i読書

[App page](https://appshunter.io/ios/app/i/id534970999)

This app allows users to download and read books from the Aozora Bunko library on their iPhone or iPad. Browse by author or title to find and save literary works for offline reading.

**Highlights:** Download Aozora Bunko books, Browse by author, Browse by title, Save books for offline reading, Simple interface

**Features:** Vision Pro support

**In-app purchases:** none


### 読書尚友

[App page](https://appshunter.io/ios/app/id1579254502)

This app is a Japanese vertical text viewer for iOS, offering access to over 10,000 works from Aozora Bunko and supporting local files. It handles various formats and provides customization options for a comfortable reading experience.

**Highlights:** Supports various file formats (text, HTML, PDF, ePub, images, etc.), Automatic character code detection, Browse Aozora Bunko by author, title, genre, and ranking, Download books directly from Aozora Bunko, Customizable font, size, background, and page direction, In-app search and bookmarking

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告削除 | $1.99 | one-time |


## Frequently asked questions

### Is i読書 free?

i読書 is free to download, with no in-app purchases.

### Is 読書尚友 free?

読書尚友 is free to download, with in-app purchases available.

### Which has better reviews, i読書 or 読書尚友?

読書尚友 is rated higher. i読書 averages 3.0 out of 5 from 3 ratings, while 読書尚友 averages 4.0 from 1 ratings.

### Do i読書 or 読書尚友 have ads?

読書尚友 shows ads; i読書 does not.

### Which is updated more often, i読書 or 読書尚友?

i読書 ships an update every 2 months, and 読書尚友 every 2 weeks. Most recently, i読書 was updated on November 1, 2026 and 読書尚友 on November 3, 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.*