# 시오리 vs 책인아웃

The clearest difference is monetization model: 책인아웃 at free against 시오리's freemium. 책인아웃 also leads on iOS requirement (15.0 vs 17.3). 시오리's advantage is update cadence (every 3 days vs every 9 days). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

시오리 ships an update every 3 days, 책인아웃 every 9 days. The most recent releases landed on October 16, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | 시오리 | 책인아웃 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/id6797207682/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | **100.0% of reviews** | 95.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 9 days |
| Monetization | Freemium | **Free** |
| Size | 150 MB | 52 MB |
| Requires iOS | 17.3 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ohttne](https://appshunter.io/developer/6788399225) | [Hail Moon](https://appshunter.io/developer/6797207684) |

## What reviewers say

### 시오리

[App page](https://appshunter.io/ios/app/and/id6788732084)

Record your reading progress, favorite quotes, and notes for each book. Create a personal reading feed with features like a sentence scanner, character relationship maps, and a focus timer.  Sync your reading data across devices.

**Highlights:** Organize books by status (reading, finished, want to read), Record quotes, notes, photos, and sticky notes per book, Scan book sentences into text, Create sentence collages with photos, Map character relationships, Track reading habits with logs and timers, Save unfamiliar words to a vocabulary list

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

**In-app purchases:** none


### 책인아웃

[App page](https://appshunter.io/ios/app/id6797207682)

This app lets you organize your reading, track your progress, and connect with other book lovers. Create a virtual bookshelf, earn photo cards for finished books, and set reading goals. Discover new books with personalized recommendations and join discussions in the community.

**Highlights:** Virtual bookshelf organization, Reading progress tracking, Book completion photo cards, Reading goals and challenges, Book community discussions, Personalized book recommendations, Import reading records via CSV

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

**In-app purchases:** none


## Frequently asked questions

### Is 시오리 free?

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

### Is 책인아웃 free?

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

### Do 시오리 or 책인아웃 have ads?

Neither 시오리 nor 책인아웃 shows ads.

### Which is updated more often, 시오리 or 책인아웃?

시오리 ships an update every 3 days, and 책인아웃 every 9 days. Most recently, 시오리 was updated on October 16, 2026 and 책인아웃 on October 18, 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.*