# Vol. vs 시오리

The clearest difference is in-app purchases: 시오리 at none against Vol.'s 2. 시오리 also leads on ads (none vs shown) and update cadence (every 3 days vs every 9 days). Vol.'s advantage is iOS requirement (15.5 vs 17.3). On price and device support there is nothing between them.

Both are free to download. Vol. sells 2 in-app purchases, starting at $2.99 per month. 시오리 asks for nothing beyond the download.

Vol. ships an update every 9 days, 시오리 every 3 days. The most recent releases landed on October 13, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Vol. | 시오리 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Every 3 days** |
| Monetization | — | Freemium |
| Size | 59 MB | 150 MB |
| Requires iOS | **15.5** | 17.3 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jeongbin Park](https://appshunter.io/developer/1819440689) | [ohttne](https://appshunter.io/developer/6788399225) |

## What reviewers say

### Vol.

[App page](https://appshunter.io/ios/app/vol/id6760890327)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Vol. Premium (1달 플랜) | $2.99 | per month |
| Vol. Premium (1년 플랜) | $19.99 | per year |


### 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 Vol. free?

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

### Is 시오리 free?

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

### Do Vol. or 시오리 have ads?

Vol. shows ads; 시오리 does not.

### Which is updated more often, Vol. or 시오리?

Vol. ships an update every 9 days, and 시오리 every 3 days. Most recently, Vol. was updated on October 13, 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.*