# PDF Master vs AI Assistant

The clearest difference is monetization model: AI Assistant at free with in-app purchases against PDF Master's subscription. AI Assistant also leads on ratings volume (4K vs 200). On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. PDF Master sells 12 in-app purchases, starting at $0.99 per 7 days and AI Assistant sells 8 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.3 for PDF Master against 4.3 for AI Assistant. That said, the two scores are not equally well evidenced: AI Assistant has 4K ratings behind it against 200, so its average is the more settled of the two. Written reviews are what separate them: 9% of PDF Master's written reviews are positive against 16% of AI Assistant's.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on September 27, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | PDF Master | AI Assistant |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (200 ratings)](https://appshunter.io/ios/app/pdf-master-editor-reader/id6471487318/reviews) | [4.3 (4K ratings)](https://appshunter.io/ios/app/ai-assistant-integrated-clean/id6476857861/reviews) |
| Number of ratings | 200 | **4K** |
| Positive reviews | 9.1% of reviews | **15.8% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 119 MB | 86 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [CheeseJoy Apps](https://appshunter.io/developer/1727983156) | [Phalanx International Limited](https://appshunter.io/developer/1612474328) |

## What reviewers say

### PDF Master

[App page](https://appshunter.io/ios/app/pdf-master-editor-reader/id6471487318)

This app offers a comprehensive suite of tools for managing PDF documents on iOS. It allows users to scan physical documents and gallery images into PDFs, create new PDFs from scratch, view existing files, merge multiple PDFs, and extract text using OCR technology.

**Highlights:** Scan photos to PDF, Convert gallery images to PDF, Create new PDF files, View and read PDF documents, Merge multiple PDF files, OCR text recognition

**Features:** macOS Compatibility

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Master | $0.99 | per 7 days |
| weekly | $4.99 | per 7 days |
| PDF Master PRO 1 Week | $5.99 | per 7 days |
| PDF Master PRO 1 Week | $5.99 | per 7 days |
| PDF Master PRO 1 Week | $5.99 | per 7 days |
| PDF Master PRO 1 Week | $9.99 | per 7 days |
| PDF Master PRO 1 Week | $9.99 | per 7 days |
| Monthly Pro | $9.99 | per month |
| PDF Master PRO 1 Year | $29.99 | per year |
| PDF Master PRO 1 Year | $34.99 | per year |
| PDF Master PRO 1 Year | $39.99 | per year |
| PDF Master Pro | $19.99 | one-time |


### AI Assistant

[App page](https://appshunter.io/ios/app/ai-assistant-integrated-clean/id6476857861)

This app uses AI to optimize your device's storage by intelligently finding and removing duplicate photos, videos, and other clutter. It offers comprehensive management tools, including contact organization and a privacy library, to keep your device running smoothly and securely.

**Highlights:** AI-powered duplicate photo finder, Automatic image categorization, Large video cleaner, Smart storage analysis, Duplicate contact remover, Privacy library for photos/videos, Security center

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $9.99 | per 7 days |
| weekly | $9.99 | per 7 days |
| Discount Weekly | $9.99 | per 7 days |
| weekly | $9.99 | per 7 days |
| monthly | $29.99 | per month |
| yearly | $59.99 | per year |
| One-time purchase | $79.99 | one-time |
| One-time purchase | $99.99 | one-time |

**What reviewers like**

- ⭐ Great clean up!
- 🙏 Awesome Job

**What reviewers complain about**

- 💰 Not free as stated
- 🤔 Unclear free features
- 🤯 Forced subscription
- 🙅‍♀️ Doesn't work as promised
- 🐌 Very slow

**Reported bugs**

- App crashes frequently
- Keeps kicking user out

**Requested features**

- Dark mode option
- More transparent free features


## Frequently asked questions

### Is PDF Master free?

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

### Is AI Assistant free?

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

### Which has better reviews, PDF Master or AI Assistant?

PDF Master and AI Assistant are both rated 4.3 out of 5 on the App Store, from 200 and 4K ratings respectively.

### Do PDF Master or AI Assistant have ads?

Both PDF Master and AI Assistant show ads.

### Which is updated more often, PDF Master or AI Assistant?

PDF Master ships an update every 2 weeks, and AI Assistant every 2 weeks. Most recently, PDF Master was updated on September 27, 2026 and AI Assistant on October 13, 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.*