Comparison

WinDat Opener vs SKipper App

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

Head to head
About

WinDat Opener

Easily open and extract attachments from winmail.dat email files. This utility integrates with your device's file manager and cloud storage, allowing you to preview or open embedded documents and images with other applications.

Highlights
  • Decodes all winmail.dat files
  • iOS 17 and iPadOS 17 support
  • Drag-and-drop support on iPads
  • File manager integration (iCloud, Dropbox)
  • Extracts and previews embedded attachments
  • Supports various document and image formats
Features
Read full description

· Decodes all winmail.dat files · iOS 17 and iPadOS 17 support · Full support for drag-and-drop on iPads · File manager integration; WinDat Opener will open and save files to and from any location that file manger supported, e.g., iCloud and DropBox WinDat Opener opens the "winmail.dat" email attachments that are sometimes sent by Outlook and Outlook Express email clients. These files are in “TNEF” format, and usually contain attachments such as spreadsheets or presentations embedded within them. WinDat Opener extracts the embedded attachments hidden inside the winmail.dat file, allowing you to preview then right in WinDat Opener, or open them with another application, e.g., Pages. WinDat Opener is simple to use - it integrates transparently with Mail on the iPhone, iPod Touch or iPad at operating system level, and has it's own integrated file manager that gives you access to locations on your device, and cloud storage provides such as DropBox and iCloud. Once WinMail Opener is installed, all you have to do is to touch any winmail.dat file, and the app you're using will offer to send it to WinMail Opener for the embedded attachments to be extracted. You can then view the extracted files using Winmail Opener’s built-in file viewer, which supports a wide variety of document formats including doc, docx, xls, xlsx, ppt, pptx and PDF, as well as most image formats such as JPEG and TIFF. If you have an application installed on your device that can edit or view an extracted file, e.g., Pages for doc files, you can open any extracted file in that application. WinDat Opener also offers the option of emailing the extracted files, right from within WinDat Opener. WinDat Opener is a universal application. It will work on the iPhone, iPod Touch or iPad, in any orientation. WinDat Opener works on any version of iOS from 11 onward.

About

SKipper App

Features
Read full description

SKipper, as the name suggests, is an application for helping you operate your boat. The first two letters, "SK", are capitalized because SKipper uses the Signal K protocol, and can display any data available on a Signal K server. If your Signal K installation uses relays or any SignalK PUT-capable device, SKipper can also control them.

Screenshots

WinDat Opener1 screens
SKipper App4 screens

Verdict

The call

The clearest difference is price: WinDat Opener at $5.99 against SKipper App's $12.99. SKipper App's advantage is update cadence (every 2 months vs every 5 months). On ads, in-app purchases, device support and iOS requirement 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

WinDat Opener costs $5.99 and SKipper App $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

WinDat Opener ships an update every 5 months, SKipper App every 2 months. Both last shipped on October 7, 2026.

Scorecard2 real differences · 8 level
WinDat Opener versus SKipper App: the parameters behind the verdict, then further details
ParameterWinDat OpenerSKipper App
Price$5.99 — better$12.99
Rating2.3 (3 ratings) — better—
Positive reviews62.5% of reviews—
Number of ratings3 — better—
Update frequencyEvery 5 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size2 MB348 MB
Age rating4+4+
DeveloperAlexander McGuffogJan Dytrych

In-app purchases

None

WinDat Opener

No in-app purchases

None

SKipper App

No in-app purchases

Questions

Is WinDat Opener free?
WinDat Opener costs $5.99, with no in-app purchases.
Is SKipper App free?
SKipper App costs $12.99, with no in-app purchases.
Do WinDat Opener or SKipper App have ads?
Neither WinDat Opener nor SKipper App shows ads.
Which is updated more often, WinDat Opener or SKipper App?
WinDat Opener ships an update every 5 months, and SKipper App every 2 months. Most recently, WinDat Opener was updated on October 7, 2026 and SKipper App on October 7, 2026.

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