Letter Opener - Open winmail.dat files and ZIP-Archives.
Free version: see sender, receiver, subject, and message text of winmail.dat files. Browse content of ZIP-Archives.

Winmail.dat Premium:
• Access to attachments
• Nested email message
• Address Book contacts
• Notes and receipts

ZIP-Archive Premium:
• View the contents of ZIP-Archives
• Extract files from ZIP-Archives
• Export a file to another app

Follow us on Twitter for updates and development news:

Please refrain from sending your bug reports or feature requests using the App Store. Instead, to ensure a direct response from us send them to We’re always happy to help our users and receive their comments!

What’s New

Version 2.2.2

• Bug fixes including the annoying restore purchase bug. Sorry about that.

If you like Letter Opener, please consider leaving a review. That helps us a lot. Thanks!

Ratings and Reviews

3.3 out of 5
381 Ratings
381 Ratings
Saanich2013 ,

Not as Advertised

This app says it is available for the Apple Family Sharing. However, it is only the basic versions, which is basically worthless. The Premium version works well and I like it, but to get it you have to buy it “in-app”. The app designer has made this so when you buy the Premium version in-app it is not able to be Family Shared. Apple said if they would set it so the Premium version was a separate app, then this would solve the problem. So beware that you cannot family share this app, even though it says you can.

VirgQuest ,

Premium version works well

I own the desktop version of this software and got a license for the full iOS version during a recent promotion. The "lite" version of this app is pretty useless, but the premium paid version does everything I need it to do. No problems at all. Would definitely recommend for anyone who gets a lot of email attachments from Exchange users.

AngieSil ,

Finally I can see attachments on my phone

I am so happy I paid for this app. I travel a lot and have had to wait to get back home to open attachments. This app works extremely well and I can highly recommend it! Don't get the basic version - upgrade and pay for the full version!


Letter Opener GmbH
6 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Dutch, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Swedish
Age Rating
Rated 4+
© 2015 Atlan Creative GmbH
In-App Purchases
  1. Winmail.dat Premium $3.99
  2. ZIP-Archive Premium $3.99


  • Family Sharing

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

More By This Developer

You May Also Like