# BookDaddy vs Ultimate Book Writer

The clearest difference is in-app purchases: BookDaddy at none against Ultimate Book Writer's 4. BookDaddy also leads on update cadence (fortnightly vs every 2 months) and iOS requirement (15.1 vs 18.5). On price, ads and device support there is nothing between them.

Both are free to download. Ultimate Book Writer sells 4 one-off in-app purchases. BookDaddy asks for nothing beyond the download.

BookDaddy ships an update fortnightly, Ultimate Book Writer every 2 months. The most recent releases landed on October 20, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | BookDaddy | Ultimate Book Writer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ultimate-book-writer/id6749588175/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 25 MB | 14 MB |
| Requires iOS | **15.1** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Deal.ai](https://appshunter.io/developer/1779155424) | [Lihai La LLC](https://appshunter.io/developer/1831311728) |

## What reviewers say

### BookDaddy

[App page](https://appshunter.io/ios/app/bookdaddy/id6744160868)

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

**In-app purchases:** none


### Ultimate Book Writer

[App page](https://appshunter.io/ios/app/ultimate-book-writer/id6749588175)

Transform your ideas into complete, professionally written ebooks using AI. This assistant generates full-length books across various genres, from fiction to business guides, in a fraction of the time. It offers smart project management and exports to multiple formats.

**Highlights:** AI-powered book generation, Full-length book creation, Multiple genre support, Customizable book length, Smart project management, Export to TXT, EPUB, Apple Books, Overcome writer's block

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Credit | $0.99 | one-time |
| 10 Credits | $9.99 | one-time |
| 100 Credits | $99.99 | one-time |
| 500 Credits | $499.99 | one-time |


## Frequently asked questions

### Is BookDaddy free?

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

### Is Ultimate Book Writer free?

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

### Do BookDaddy or Ultimate Book Writer have ads?

Neither BookDaddy nor Ultimate Book Writer shows ads.

### Which is updated more often, BookDaddy or Ultimate Book Writer?

BookDaddy ships an update fortnightly, and Ultimate Book Writer every 2 months. Most recently, BookDaddy was updated on October 20, 2026 and Ultimate Book Writer on October 7, 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.*