File Viewer vs Winmaildat Opener
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
File Viewer
Easily open and view over 100 different file types, including documents, images, videos, and archives. Browse files stored on your device or in iCloud Drive. This app also identifies unknown files and displays detailed file information.
- Open 100+ file types
- Browse device and iCloud Drive
- Built-in readers for Office, PDF, and images
- Extract compressed archives
- Identify unknown files
- View file information and metadata
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File Viewer is an easy-to-use file viewer opens over 100 file types, including PDFs, Office documents, images, videos, audio, and compressed archives. Browse and view files on your device or iCloud Drive with ease. Key Features - Open 100+ file types with a single app - Browse files on your device and iCloud Drive - Bookmark favorite locations including iCloud and device storage - View documents with the built-in DOCX reader, DOC reader, PDF viewer, PPTX viewer, PPT viewer, and CSV viewer - Extract compressed archives with the Zip file extractor and Tar Gzip extractor - Identify unknown files with the built-in file identification technology - Show file information including properties and hidden metadata Supported File Types - Documents: PDF, DOC, DOCX, RTF, PAGES - Spreadsheets: XLS, XLSX, NUMBERS - Presentations: PPT, PPTX, PPSX, KEY - Images: JPEG, PNG, AVIF, JXL, HEIC, PSD, SVG - Videos: MP4, MOV, AVI, 3G2, M4V - Audio: M4A, MP3, WAV, AIF, AC3 - Archives: ZIP, GZ, TAR, TGZ - Camera Raw: ARW, CR2, CR3, DNG, NEF - Source Code & Web: HTML, C++, Java, Python, JSON, XML - And many more! File Viewer is brought to you by https://fileinfo.com - a trusted source for file format information.
Winmaildat Opener
Easily open and access files from winmail.dat attachments on your mobile device. This utility allows you to preview, resend, print, or save contained files without needing an internet connection. An optional purchase removes ads.
- Open winmail.dat attachments
- Preview contained files
- Resend or print files
- Save files to device
- Offline extraction
- Registers as .dat file handler
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Winmail.dat Opener is a free app to open those common 'winmail.dat' attachments. This app is free of charge and fully functional, giving you access to the files without any need for further in-app purchases. The optional in-app-purchase will remove ads. Our app registers as a handler for .dat files. It is launched when you tap to open the "winmail.dat" attachment, enabling you to see a list of its contents. You can then preview, resend or print the contained files or save them to an album. This app will extract the winmail.dat on your phone or tablet, it does not require an Internet connection for this process. As our app is ad-supported, it has to ask for permission to access the Internet, despite the fact that the actual extraction process does not require an Internet connection. Kindly note that not every file ending with .dat is a winmail.dat file. So, before submitting a one star review stating that our service didn’t work, please ensure that your file is indeed a winmail.dat file and not one of a hundred different file types with a .dat extension.
Screenshots
Verdict
File Viewer and Winmaildat Opener both sit at 3.4 stars, but that hides the real split: 78% of Winmaildat Opener's written reviews are positive against 38% of File Viewer's. Winmaildat Opener also leads on ratings volume (77 vs 5) and iOS requirement (13.0 vs 18.0). File Viewer's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, rating, update cadence 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
Both are free to download. Winmaildat Opener sells 1 one-off in-app purchase. File Viewer asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 3.4 for File Viewer against 3.5 for Winmaildat Opener. That said, the two scores are not equally well evidenced: Winmaildat Opener has 77 ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 38% of File Viewer's written reviews are positive against 78% of Winmaildat Opener's.
File Viewer ships an update every 6 months, Winmaildat Opener every 5 months. The most recent releases landed on October 21, 2026 and October 23, 2026 respectively.
| Parameter | File Viewer | Winmaildat Opener |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (5 ratings) | 3.5 (77 ratings) — better |
| Positive reviews | 37.8% of reviews | 78.2% of reviews — better |
| Number of ratings | 5 | 77 — better |
| Update frequency | Every 6 months | Every 5 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 18.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 20 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Sharpened Productions | Maklabu GmbH |
Customer experience
File Viewer
Winmaildat Opener
Bugs and requests
File Viewer
Not enough reviews yet to summarise bugs or requests.
Winmaildat Opener
Reported bugs
3 issues- Crashes on certain file types
- Doesn't work with iOS 13 and later
- Fails to open some winmail.dat attachments
Requested features
3 requests- Add ability to delete opened files
- Improve file handling and reliability
- Update design to match modern iOS
In-app purchases
File Viewer
No in-app purchases
Winmaildat Opener
- Remove Ads$0.99
Questions
Is File Viewer free?
Is Winmaildat Opener free?
Which has better reviews, File Viewer or Winmaildat Opener?
Do File Viewer or Winmaildat Opener have ads?
Which is updated more often, File Viewer or Winmaildat Opener?
Other comparisons
