Comparison

Winmail Viewer vs Reader

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Winmail Viewer

Easily open and view Winmail.dat, MSG, and XPS email files that are incompatible with most email clients. Convert embedded content like appointments and notes into native iOS formats, and access all attachments within these files.

Highlights
  • Open Winmail.dat, MSG, and XPS files
  • Convert appointments, notes, and contacts
  • Access all attachments
  • Export files to other apps
  • iOS native format conversion
Features
Read full description

Open Winmail.dat, MSG and XPS files with just a tap. ABOUT A winmail.dat file or MSG file is an email from Microsoft Outlook that can not be read by other email applications. It needs to be converted for the content to be accessible. Letter Opener does that with a simple tap! With over 10 years experience (and a special dislike for winmail.dat files) we made sure that working together with Microsoft Outlook and Windows users can be simple and seamless. FEATURES - Open Winmail.dat and MSG files and convert appointments, notes, contacts etc. to iOS native formats. - Get access to all attachments in Winmail.dat files. - Export files to another app. SUPPORT We provide direct personal support, so don’t hesitate to contact us if you have any questions or comments: support@winmail.help Thanks for helping us to keep improving Letter Opener! TERMS OF USE https://winmail.help/legal/terms

About

Reader

Features
Read full description

Reader A clean, distraction-free reading app for the books already on your device. Reader opens the formats your library is actually in — EPUB, plain text, Markdown, FictionBook, Mobipocket, and Kindle files — without requiring an account, a subscription, or an internet connection. Your books stay where they are. Designed for reading Pages are laid out in native text, not a web view. Font size, line spacing, and theme adapt to your preference and look right at any screen size. Rotate freely — Reader reflows to the new dimensions and returns you to the exact sentence you were on. Your whole library, one place Import a book once; Reader keeps it ready to open. Drag a file in from Files or Finder, pick it from the share sheet, or open it directly in place — whichever fits how you work. Focused, not cluttered The interface stays out of the way while you read. A tap brings up the progress bar, chapter title, and navigation. Another tap, and it's gone. Private by design Reader has no network access and requests no permissions beyond the files you explicitly open. Nothing leaves your device.

Screenshots

Winmail Viewer4 screens
Reader4 screens

Verdict

The call

The clearest difference is in-app purchases: Reader at none against Winmail Viewer's 8. Winmail Viewer's advantage is update cadence (every 9 days vs monthly) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Winmail Viewer sells 8 in-app purchases, starting at $0.99 per 7 days. Reader asks for nothing beyond the download.

UpkeepUpdate frequency

Winmail Viewer ships an update every 9 days, Reader monthly. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Winmail Viewer versus Reader: the parameters behind the verdict, then further details
ParameterWinmail ViewerReader
PriceFreeFree
Rating4.7 (5K ratings) — better—
Positive reviews88.6% of reviews—
Number of ratings5K — better—
Update frequencyEvery 9 days — betterMonthly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, Mac
Requires iOS15.0 — better17.0
Further details — not scored
Size52 MB2 MB
Age rating4+4+
DeveloperLetter Opener GmbH小康 刘

In-app purchases

8 purchases

Winmail Viewer

Subscriptions4
  • Weekly$0.997 Days
  • Monthly$1.991 Month
  • Yearly$9.991 Year
Show 1 more
  • Professional$49.991 Year
One-time4
  • Winmail.dat Premium$19.99
  • MSG Premium$19.99
  • File Extension Premium$19.99
Show 1 more
  • XPS Premium$19.99
None

Reader

No in-app purchases

Questions

Is Winmail Viewer free?
Winmail Viewer is free to download, with in-app purchases available.
Is Reader free?
Reader is free to download, with no in-app purchases.
Do Winmail Viewer or Reader have ads?
Neither Winmail Viewer nor Reader shows ads.
Which is updated more often, Winmail Viewer or Reader?
Winmail Viewer ships an update every 9 days, and Reader monthly. Most recently, Winmail Viewer was updated on October 31, 2026 and Reader on October 24, 2026.

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