The FileOpen Viewer enables authorized users to access documents secured by FileOpen document security and rights management solutions. FileOpen Viewer supports PDF or OPN file formats opened on an iPad, iPhone or iPod touch. Content owners may require that devices be registered or authenticated, and may impose limits on the number of devices allowed. Please contact the document owner or publisher for specific instructions or support.

What’s New

Version 2.4.6

- update for iOS 11
- fixed custom error messages

One of the last updates before we release a completely new app.

Ratings and Reviews

1.0 out of 5
22 Ratings

22 Ratings

Kroberson ,


Yes, it will open a decrypted file. But that’s where the usefulness ends.

You would think that, once a PDF file is decrypted one would be able to save the decrypted file to the same device for opening in Adobe Acrobat.

Just to be clear this is NOT a plug in for Acrobat.

This is a stand alone, excruciatingly slow, file decryption and (practically unusable) file viewer.

The file has to be decrypted each time the file is opened. This process takes several minutes on every use. Once into the file there are no search, find, highlight, or any other kind of tools. The file scrolls slowly when manipulated.

The files I’m attempting to use are for my business. The glacial speed of this app has caused embarrassment and frustration on many occasions.

I have no other choice as the publisher of the documents insist on using this awful program.

Also note, the last plate was in 2017. It is obvious to me that FileOpen management has no real interest in supporting iOS users.

If you can avoid encrypting with FileOpen, do yourself and your customers a favor and use a different method than FileOpen.

kadabasp ,

Totally meaningless

I understand the need for encryption of pdf files and this app is supposed to help view pdf files that have FileOpen encryption. However, it is absolutely useless and meaningless to spend ungodly time waiting for the file to decrypt in the viewer just to find out that once you close it, you will have to go through the process again. Why would someone even think of something like this? If I could give this a negative rating, it would still be an understatement. The UI is terrible too.

Edward R. ,

Instructions would have been nice

Apparently the developer doesn’t have pride in their work because this is simply a poorly designed app that lacks even the most basic instructions on how to use. As of this writing the last update was over 2 years ago, so they’re clearly not interested in making it better. But of course, they can get away with it because there’s no other choice if you want to open one of their documents.


FileOpen Systems Inc.
26.9 MB

Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Czech, Danish, Dutch, French, German, Hebrew, Italian, Japanese, Korean, Norwegian Bokmål, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Traditional Chinese, Turkish

Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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