# Atom PDF vs Cat Novel Author

The clearest difference is in-app purchases: Atom PDF at none against Cat Novel Author's 10. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Cat Novel Author sells 10 one-off in-app purchases. Atom PDF asks for nothing beyond the download.

Atom PDF ships an update every 2 months, Cat Novel Author every 3 months. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Atom PDF | Cat Novel Author |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/atom-pdf-ocr-and-edit-document/id1663437816/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free | — |
| Size | 71 MB | 65 MB |
| Requires iOS | **13.0** | 14.3 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [BHIPSTER WORLD NETWORK TECH LIMITED](https://appshunter.io/developer/1657409447) | [靖 伍](https://appshunter.io/developer/1736748449) |

## What reviewers say

### Atom PDF

[App page](https://appshunter.io/ios/app/atom-pdf-ocr-and-edit-document/id1663437816)

This app streamlines document workflows with features like PDF creation from images, versatile editing tools, and AI-powered chat support. It offers curated templates for business and personal use, along with local PDF reading and document history management.

**Highlights:** Convert images to PDF, Merge, split, crop PDFs, Business and personal templates, AI chat assistant for PDF queries, Local PDF reading, Document history management

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

**In-app purchases:** none


### Cat Novel Author

[App page](https://appshunter.io/ios/app/cat-novel-author/id6615070690)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 黑貓付費服務.10 | $8.19 | one-time |
| 黑貓付費服務.2 | $19.99 | one-time |
| 黑貓付費服務.3 | $29.99 | one-time |
| 黑貓付費服務.6 | $34.99 | one-time |
| 黑貓付費服務.4 | $59.99 | one-time |
| 黑貓付費服務.7 | $64.99 | one-time |
| 黑貓付費服務.5 | $99.99 | one-time |
| 黑貓付費服務.8 | $149.99 | one-time |
| 黑貓付費服務.11 | $299.00 | one-time |
| 黑貓付費服務.9 | $364.99 | one-time |


## Frequently asked questions

### Is Atom PDF free?

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

### Is Cat Novel Author free?

Cat Novel Author is free to download, with in-app purchases available.

### Do Atom PDF or Cat Novel Author have ads?

Neither Atom PDF nor Cat Novel Author shows ads.

### Which is updated more often, Atom PDF or Cat Novel Author?

Atom PDF ships an update every 2 months, and Cat Novel Author every 3 months. Most recently, Atom PDF was updated on October 7, 2026 and Cat Novel Author on October 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.*