# Book2App vs Siouks

The clearest difference is in-app purchases: Siouks at none against Book2App's 3. Siouks also leads on ads (none vs shown) and update cadence (monthly vs every 3 months). Book2App's advantage is iOS requirement (11.0 vs 13.0). On price and device support there is nothing between them.

Both are free to download. Book2App sells 3 one-off in-app purchases. Siouks asks for nothing beyond the download.

Book2App ships an update every 3 months, Siouks monthly. The most recent releases landed on September 21, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Book2App | Siouks |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Monthly** |
| Size | 22 MB | 15 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ipsilon Developments Inc](https://appshunter.io/developer/1003755058) | [Axiv IT](https://appshunter.io/developer/1806373321) |

## What reviewers say

### Book2App

[App page](https://appshunter.io/ios/app/book2app/id1488678677)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Credit Recharge | $1.99 | one-time |
| 2 Credits Recharge | $3.99 | one-time |
| 10 Credits Recharge | $19.99 | one-time |


### Siouks

[App page](https://appshunter.io/ios/app/siouks/id6744175276)

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

**In-app purchases:** none


## Frequently asked questions

### Is Book2App free?

Book2App is free to download, with in-app purchases available.

### Is Siouks free?

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

### Do Book2App or Siouks have ads?

Book2App shows ads; Siouks does not.

### Which is updated more often, Book2App or Siouks?

Book2App ships an update every 3 months, and Siouks monthly. Most recently, Book2App was updated on September 21, 2026 and Siouks on September 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*