# Pacibook vs OpenLibrary Explorer

The clearest difference is in-app purchases: OpenLibrary Explorer at none against Pacibook's 3. Pacibook's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Pacibook sells 3 one-off in-app purchases. OpenLibrary Explorer asks for nothing beyond the download.

Pacibook ships an update every 6 days, OpenLibrary Explorer every 8 days. The most recent releases landed on October 12, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Pacibook | OpenLibrary Explorer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 6 days** | Every 8 days |
| Size | 44 MB | 31 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Prashant Mishra](https://appshunter.io/developer/6792524659) | [Mahesh Rathi](https://appshunter.io/developer/6801780469) |

## What reviewers say

### Pacibook

[App page](https://appshunter.io/ios/app/pacibook-ebook-reader/id6792524657)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Reading Pass | $1.99 | one-time |
| Monthly Reading Pass | $5.99 | one-time |
| Monthly Reading Pass + AI | $9.99 | one-time |


### OpenLibrary Explorer

[App page](https://appshunter.io/ios/app/openlibrary-explorer/id6807614835)

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

**In-app purchases:** none


## Frequently asked questions

### Is Pacibook free?

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

### Is OpenLibrary Explorer free?

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

### Do Pacibook or OpenLibrary Explorer have ads?

OpenLibrary Explorer shows ads; Pacibook does not.

### Which is updated more often, Pacibook or OpenLibrary Explorer?

Pacibook ships an update every 6 days, and OpenLibrary Explorer every 8 days. Most recently, Pacibook was updated on October 12, 2026 and OpenLibrary Explorer on October 14, 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.*