# Disk Mounter vs Book

The clearest difference is rating: Disk Mounter at 3.8 against Book's 3.0. Disk Mounter also leads on update cadence (monthly vs every 6 months) and review sentiment (65% vs 50%). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Disk Mounter sells 2 one-off in-app purchases and Book sells 1 in-app purchase, starting at $4.99 per year. Whichever you choose, the download price is not the number that matters.

Disk Mounter holds the better App Store score, 3.8 against 3.0. Both are backed by a comparable volume of ratings — 9 and 2 respectively. Written reviews point the same way: 65% of Disk Mounter's written reviews are positive against 50% of Book's.

Disk Mounter ships an update monthly, Book every 6 months. The most recent releases landed on September 1, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Disk Mounter | Book |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (9 ratings)](https://appshunter.io/ios/app/disk-mounter/id797165837/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/book-binder/id1550900266/reviews) |
| Number of ratings | **9** | 2 |
| Positive reviews | **65.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 41 MB | 4 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Certchip Corp](https://appshunter.io/developer/1652474819) | [Hexagonal Studios Limited](https://appshunter.io/developer/1550900268) |

## What reviewers say

### Disk Mounter

[App page](https://appshunter.io/ios/app/disk-mounter/id797165837)

Transform your smartphone into a wireless disk drive for your computer. Easily share files, photos, and important documents securely. Offers additional tools like audio/video conversion and a secret folder for sensitive data.

**Highlights:** Connect smartphone as wireless disk, Share photos and files wirelessly, High-speed data transmission, Secure secret folder with password/Touch ID, Audio and video file conversion, Photo and video editing, Integrated music player and voice recorder

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | Free | one-time |
| Pro Version | $0.99 | one-time |


### Book

[App page](https://appshunter.io/ios/app/book-binder/id1550900266)

Create publication-ready ePub and PDF files from your manuscripts. Effortlessly transform text into formats suitable for eBook distribution and print-on-demand services. Ideal for fiction authors preparing their work for platforms like Amazon.

**Highlights:** Generates ePub and PDF files, Assembles publication-ready fiction novels, Transforms Markdown or plain text manuscripts, Suitable for eBook distribution, Supports print-on-demand books, Directly integrates with Amazon

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Book-Binder Subscription | $4.99 | per year |


## Frequently asked questions

### Is Disk Mounter free?

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

### Is Book free?

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

### Which has better reviews, Disk Mounter or Book?

Disk Mounter is rated higher. Disk Mounter averages 3.8 out of 5 from 9 ratings, while Book averages 3.0 from 2 ratings.

### Do Disk Mounter or Book have ads?

Neither Disk Mounter nor Book shows ads.

### Which is updated more often, Disk Mounter or Book?

Disk Mounter ships an update monthly, and Book every 6 months. Most recently, Disk Mounter was updated on September 1, 2026 and Book on June 1, 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.*