# ChatBooks vs カクヨムViewer

The clearest difference is price: カクヨムViewer at Free against ChatBooks's $4.99. カクヨムViewer also leads on update cadence (fortnightly vs every 27 months) and review sentiment (16% vs 0%). ChatBooks's advantage is ads (none vs shown) and iOS requirement (15.0 vs 18.6). On in-app purchases and device support there is nothing between them.

カクヨムViewer is free to download; ChatBooks costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ChatBooks ships an update every 27 months, カクヨムViewer fortnightly. The most recent releases landed on November 4, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | ChatBooks | カクヨムViewer |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | — | **[4.7 (50 ratings)](https://appshunter.io/ios/app/viewer-web/id1081762516/reviews)** |
| Number of ratings | — | **50** |
| Positive reviews | 0.0% of reviews | **16.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 27 months | **Fortnightly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 28 MB | 53 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 12+ |
| Developer | [KOJI HARA](https://appshunter.io/developer/566940810) | [KADOKAWA CORPORATION](https://appshunter.io/developer/986639480) |

## What reviewers say

### ChatBooks

[App page](https://appshunter.io/ios/app/chatbooks-literary-stream/id929849945)

Experience Japanese literary masterpieces as if their authors were alive today, posting their works on a social media timeline. Over 400 classic and modern works are available for unlimited reading, allowing you to follow favorite authors and share passages.

**Highlights:** Literary giants post works like social media, Over 400 masterpieces available, Unlimited reading of classics and modern literature, Follow favorite authors, Save and share favorite passages, Customizable timeline

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

**In-app purchases:** none


### カクヨムViewer

[App page](https://appshunter.io/ios/app/viewer-web/id1081762516)

This app provides access to a vast collection of web novels and light novels, including original works and fanfiction. Users can customize their reading experience with adjustable backgrounds and fonts, and enjoy offline reading. It also offers a subscription service for exclusive new titles.

**Highlights:** Browse novels by genre, Follow favorite novels, Offline reading support, Customizable reader settings, Notifications for new chapters, Support original and fanfiction works

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

**In-app purchases:** none


## Frequently asked questions

### Is ChatBooks free?

ChatBooks costs $4.99, with no in-app purchases.

### Is カクヨムViewer free?

カクヨムViewer is free to download, with no in-app purchases.

### Do ChatBooks or カクヨムViewer have ads?

カクヨムViewer shows ads; ChatBooks does not.

### Which is updated more often, ChatBooks or カクヨムViewer?

ChatBooks ships an update every 27 months, and カクヨムViewer fortnightly. Most recently, ChatBooks was updated on November 4, 2026 and カクヨムViewer on November 2, 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.*