# Durofix vs Nitro PDF Pro

The clearest difference is review sentiment: Durofix at 100% against Nitro PDF Pro's 12%. Durofix also leads on rating (5.0 vs 3.9) and in-app purchases (none vs 2). Nitro PDF Pro's advantage is update cadence (every 2 months vs every 30 months) and ratings volume (161 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Nitro PDF Pro sells 2 in-app purchases, starting at $19.99 per year. Durofix asks for nothing beyond the download.

Durofix holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Nitro PDF Pro has 161 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Durofix's written reviews are positive against 12% of Nitro PDF Pro's.

Durofix ships an update every 30 months, Nitro PDF Pro every 2 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Durofix | Nitro PDF Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/durofix/id1503621008/reviews)** | [3.9 (161 ratings)](https://appshunter.io/ios/app/nitro-pdf-pro-read-and-edit/id1608616539/reviews) |
| Number of ratings | 1 | **161** |
| Positive reviews | **100.0% of reviews** | 12.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 30 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 15 MB | 63 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Mobiletron Electronics Co., Ltd.](https://appshunter.io/developer/1345295980) | [Nitro Software, Inc.](https://appshunter.io/developer/1607870122) |

## What reviewers say

### Durofix

[App page](https://appshunter.io/ios/app/durofix/id1503621008)

Connect to smart assembly tools to configure functions and track daily work data. Adjust tool parameters for precise torque control and monitor tightening statuses for quality assurance.

**Highlights:** Connect to Durofix Assembly Tools, Set up tool functions, Collect daily work data, Adjust speed for precise torque control, Record tightening status (ok/nok), Trace tightening status of parts

**In-app purchases:** none


### Nitro PDF Pro

[App page](https://appshunter.io/ios/app/nitro-pdf-pro-read-and-edit/id1608616539)

Edit, annotate, and secure PDF documents on the go. This app offers powerful tools for professionals to manage PDFs, including mobile scanning and AI-powered data extraction. Seamlessly integrate with cloud services and use styluses for precise markups.

**Highlights:** Edit and annotate PDFs with precision tools, Organize pages, merge, and extract PDFs, Mobile scanning with OCR for searchable PDFs, Secure documents with password protection, AI-powered data extraction from tables, Seamless integration with cloud storage

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Subscription | $19.99 | per year |
| Nitro PDF Pro for iOS | $9.99 | one-time |

**What reviewers like**

- 👍 Helpful for managing project documents
- 👍 Convenient for PDF modifications
- 👍 Superior PDF handling on Mac
- 👍 Satisfactory in both Mac and Windows environments

**What reviewers complain about**

- 👎 Pro features not available on iOS/iPadOS
- 👎 Yearly charges for basic features
- 👎 Expensive and useless
- 👎 Fails to deliver promised features
- 👎 Impossible to reorder PDF files

**Reported bugs**

- Cannot reorder PDF files
- Crashes when opening PDFs from websites/email
- Does not save markups or documents
- Difficulty creating new folders
- Cannot rotate pages

**Requested features**

- Keyboard support (Cmd + F for search)
- Ability to cancel search with Esc
- OCR and conversion to text documents on tablets
- User manual for iPad app
- Support for Apple Pencil


## Frequently asked questions

### Is Durofix free?

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

### Is Nitro PDF Pro free?

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

### Which has better reviews, Durofix or Nitro PDF Pro?

Durofix is rated higher. Durofix averages 5.0 out of 5 from 1 ratings, while Nitro PDF Pro averages 3.9 from 161 ratings.

### Do Durofix or Nitro PDF Pro have ads?

Neither Durofix nor Nitro PDF Pro shows ads.

### Which is updated more often, Durofix or Nitro PDF Pro?

Durofix ships an update every 30 months, and Nitro PDF Pro every 2 months. Most recently, Durofix was updated on November 3, 2026 and Nitro PDF Pro on November 3, 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.*