# 책피자 vs 시오리

The clearest difference is update cadence: 시오리 at every 3 days against 책피자's every 8 days. 책피자's advantage is monetization model (ad-supported vs freemium) and iOS requirement (15.1 vs 17.3). 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.

책피자 ships an update every 8 days, 시오리 every 3 days. The most recent releases landed on October 10, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | 책피자 | 시오리 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 3 days** |
| Monetization | **Ad-supported** | Freemium |
| Size | 63 MB | 150 MB |
| Requires iOS | **15.1** | 17.3 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yeoun Yi](https://appshunter.io/developer/1582412629) | [ohttne](https://appshunter.io/developer/6788399225) |

## What reviewers say

### 책피자

[App page](https://appshunter.io/ios/app/and/id6772453636)

Track your reading with a charming pizza theme. Rate books with pepperoni, share reviews with friends, and discover new reads. Organize short stories and novels into unique pizza creations.

**Highlights:** Rate books with pepperoni toppings, Organize stories into pizza slices or whole pizzas, Follow friends and like their reviews, Discover popular books and short stories, View reviews for individual short stories across collections

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is 책피자 free?

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

### Is 시오리 free?

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

### Do 책피자 or 시오리 have ads?

Neither 책피자 nor 시오리 shows ads.

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

책피자 ships an update every 8 days, and 시오리 every 3 days. Most recently, 책피자 was updated on October 10, 2026 and 시오리 on October 16, 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.*