# PDF Max vs Empolis Industrial Knowledge

The clearest difference is review sentiment: Empolis Industrial Knowledge at 75% against PDF Max's 35%. Empolis Industrial Knowledge also leads on in-app purchases (none vs 10) and iOS requirement (16.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. PDF Max sells 10 in-app purchases, starting at $1.99 per 7 days. Empolis Industrial Knowledge asks for nothing beyond the download.

PDF Max ships an update monthly, Empolis Industrial Knowledge every 4 weeks. The most recent releases landed on October 22, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | PDF Max | Empolis Industrial Knowledge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (1.2K ratings)](https://appshunter.io/ios/app/pdf-max-edit-sign-pdfs/id540572073/reviews)** | — |
| Number of ratings | **1.2K** | — |
| Positive reviews | 35.4% of reviews | **75.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 weeks** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 266 MB | 274 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mobeera](https://appshunter.io/developer/540572076) | [Empolis Information Management GmbH](https://appshunter.io/developer/1293249623) |

## What reviewers say

### PDF Max

[App page](https://appshunter.io/ios/app/pdf-max-edit-sign-pdfs/id540572073)

This app allows you to read, annotate, and sign PDF documents on your mobile device. You can mark up text, add handwritten notes, insert stamps, fill out forms, and manage PDF pages. It also offers robust file management and cloud integration for seamless access to your documents.

**Highlights:** Read and annotate PDFs, Fill and sign PDF forms, Handwriting and text markup, Manage PDF pages, Cloud storage integration, Voice annotations

**Features:** Family Sharing, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Subscription (1 week) | $1.99 | per 7 days |
| One year premium | $34.99 | per year |
| Yearly Onboarding Offer | $34.99 | per year |
| Standard Annotating Package | $0.99 | one-time |
| Cloud Access Package | $1.99 | one-time |
| Advanced Annotating Package | $3.99 | one-time |
| Form Filling Package | $3.99 | one-time |
| Pro Package | $4.99 | one-time |
| Premium Package (Update) | $4.99 | one-time |
| Premium Package (New User) | $9.99 | one-time |

**What reviewers like**

- 🚀 Easy to use
- 👍 Helpful for studies and work
- 🚀 Fast and efficient
- 👍 Great for annotating PDFs

**What reviewers complain about**

- 🐛 Crashes frequently
- 🔒 Unreliable cloud sync
- 💰 Paywall for basic features
- 🐛 Buggy updates
- 👎 Poor customer support

**Reported bugs**

- Disappearing documents and annotations
- Incompatibility with newer devices
- Crashes on launch
- Unreliable file saving

**Requested features**

- Dark mode option
- Ability to edit/delete annotations
- Better integration with cloud storage
- Split-screen viewing for PDFs
- Improved handwriting recognition


### Empolis Industrial Knowledge

[App page](https://appshunter.io/ios/app/empolis-industrial-knowledge/id1376571362)

Access comprehensive service knowledge on your mobile device, both online and offline. Quickly find solutions to customer requests, create and share new service notes, and collaborate with colleagues to solve complex problems. Ensures data security and GDPR compliance.

**Highlights:** Mobile knowledge hub, Offline availability, Create and share service knowledge, Community and team knowledge collaboration, Intelligent search, GDPR compliant data security

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF Max free?

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

### Is Empolis Industrial Knowledge free?

Empolis Industrial Knowledge is free to download, with no in-app purchases.

### Do PDF Max or Empolis Industrial Knowledge have ads?

Neither PDF Max nor Empolis Industrial Knowledge shows ads.

### Which is updated more often, PDF Max or Empolis Industrial Knowledge?

PDF Max ships an update monthly, and Empolis Industrial Knowledge every 4 weeks. Most recently, PDF Max was updated on October 22, 2026 and Empolis Industrial Knowledge 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.*