# book vs UniReader

The clearest difference is in-app purchases: book at none against UniReader's 3. book also leads on iOS requirement (9.0 vs 17.0). UniReader's advantage is update cadence (every 3 weeks vs every 8 months). On price, ads and device support there is nothing between them.

Both are free to download. UniReader sells 3 in-app purchases, starting at $1.99 per month. book asks for nothing beyond the download.

book ships an update every 8 months, UniReader every 3 weeks. The most recent releases landed on October 10, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | book | UniReader |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 18 MB | 19 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 17+ | 4+ |
| Developer | [Sharp Corporation](https://appshunter.io/developer/454644836) | [Guglielmo Pasa](https://appshunter.io/developer/417854438) |

## What reviewers say

### book

[App page](https://appshunter.io/ios/app/book-in-the-box/id588963852)

This application allows users to view e-book content downloaded from compatible e-book sites. It offers a bookshelf and viewer for a seamless reading experience. Users can manage their account information and registered devices.

**Highlights:** View downloaded e-book content, Bookshelf and viewer interface, Account management, Device registration/deregistration, Improved display and usability

**Features:** Vision Pro support

**In-app purchases:** none


### UniReader

[App page](https://appshunter.io/ios/app/unireader-multi-format-reader/id6759504986)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| UniReader Premium Monthly | $1.99 | per month |
| UniReader Premium Yearly | $19.99 | per year |
| UniReader Premium Lifetime | $34.99 | one-time |


## Frequently asked questions

### Is book free?

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

### Is UniReader free?

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

### Do book or UniReader have ads?

Neither book nor UniReader shows ads.

### Which is updated more often, book or UniReader?

book ships an update every 8 months, and UniReader every 3 weeks. Most recently, book was updated on October 10, 2026 and UniReader on October 11, 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.*