# DUS Master vs PDFix Master

The clearest difference is in-app purchases: DUS Master at none against PDFix Master's 3. DUS Master also leads on ads (none vs shown) and update cadence (every 10 days vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. PDFix Master sells 3 in-app purchases, starting at $0.99 per 7 days. DUS Master asks for nothing beyond the download.

DUS Master ships an update every 10 days, PDFix Master every 2 months. The most recent releases landed on October 7, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | DUS Master | PDFix Master |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/dus-master/id6474985706/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 90.2% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 10 days** | Every 2 months |
| Monetization | Free | — |
| Size | 33 MB | 56 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Ahmet Ay](https://appshunter.io/developer/1185833917) | [MURAT SERKAN KEKECDL](https://appshunter.io/developer/1864017953) |

## What reviewers say

### DUS Master

[App page](https://appshunter.io/ios/app/dus-master/id6474985706)

This app streamlines the DUS exam preparation and application process. It offers tools for studying, performance analysis, and preference simulation, helping users manage their DUS journey effectively.

**Highlights:** DUS Timer, Study Calendar & Analysis, Study Groups, Performance School, Preference Simulation, Branch Statistics, Score & Ranking Calculation

**Features:** macOS Compatibility

**In-app purchases:** none


### PDFix Master

[App page](https://appshunter.io/ios/app/pdfix-master-pdf-tools/id6766498847)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro | $0.99 | per 7 days |
| Monthly Pro | $2.99 | per month |
| Yearly Pro | $19.99 | per year |


## Frequently asked questions

### Is DUS Master free?

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

### Is PDFix Master free?

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

### Do DUS Master or PDFix Master have ads?

PDFix Master shows ads; DUS Master does not.

### Which is updated more often, DUS Master or PDFix Master?

DUS Master ships an update every 10 days, and PDFix Master every 2 months. Most recently, DUS Master was updated on October 7, 2026 and PDFix Master on September 29, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*