# FileOpen PDF Viewer vs eyebase Mobile

The clearest difference is update cadence: eyebase Mobile at every 5 days against FileOpen PDF Viewer's every 10 months. FileOpen PDF Viewer's advantage is iOS requirement (11 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

FileOpen PDF Viewer ships an update every 10 months, eyebase Mobile every 5 days. The most recent releases landed on October 21, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | FileOpen PDF Viewer | eyebase Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (4 ratings)](https://appshunter.io/ios/app/fileopen-pdf-viewer/id1645208749/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 12.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 120 MB | 44 MB |
| Requires iOS | **11** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FileOpen Systems Inc.](https://appshunter.io/developer/520287058) | [CMB Informationssysteme GmbH](https://appshunter.io/developer/1628507371) |

## What reviewers say

### FileOpen PDF Viewer

[App page](https://appshunter.io/ios/app/fileopen-pdf-viewer/id1645208749)

This application allows users to view PDFs that have been encrypted using FileOpen technology on their Apple devices. It provides a straightforward way to access secure documents on iPhones and iPads.

**Highlights:** View FileOpen encrypted PDFs, Supports Apple devices, Simple document access, Secure PDF viewing

**Features:** macOS Compatibility

**In-app purchases:** none


### eyebase Mobile

[App page](https://appshunter.io/ios/app/eyebase-mobile/id6472037940)

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

**In-app purchases:** none


## Frequently asked questions

### Is FileOpen PDF Viewer free?

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

### Is eyebase Mobile free?

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

### Do FileOpen PDF Viewer or eyebase Mobile have ads?

Neither FileOpen PDF Viewer nor eyebase Mobile shows ads.

### Which is updated more often, FileOpen PDF Viewer or eyebase Mobile?

FileOpen PDF Viewer ships an update every 10 months, and eyebase Mobile every 5 days. Most recently, FileOpen PDF Viewer was updated on October 21, 2026 and eyebase Mobile on October 22, 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.*