Comparison

Winmail Viewer vs ShelfCheck Pro

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

Head to head
About

Winmail Viewer

Effortlessly open and view various email attachment formats, including Winmail.dat and MSG files. Extract embedded documents and images, and manage your files with integrated storage. Supports a wide range of email and document types for seamless access.

Highlights
  • Open Winmail.dat, MSG, OFT, XPS/OXPS, and EML files
  • Extract attachments like PDFs and Office documents
  • View formatted messages with original layout
  • Search messages by subject, sender, or keyword
  • Save and organize files with SwiftData storage
  • Dark Mode support
  • iOS Files app integration
Features
Read full description

Open and view Winmail.dat (Microsoft TNEF), MSG, OFT, XPS/OXPS, and EML files instantly on iPhone and iPad. Access Outlook-generated attachments, decode hidden content, and extract files in seconds. Winmail Viewer is designed to open Microsoft Outlook and Exchange email formats that many apps can’t read. Whether you receive a Winmail.dat (TNEF) attachment or an Outlook MSG/OFT message file, the app decodes and displays the full content — including formatted messages and embedded attachments — so nothing is lost. Open files directly from Mail, Files, AirDrop, or any supported app, and instantly access the message body, documents, and images inside. SUPPORTED FILE TYPES • Winmail.dat (Microsoft TNEF) — Decode Transport Neutral Encapsulation Format files generated by Outlook and Exchange • MSG — Open standalone Microsoft Outlook message files with full formatting and attachments • OFT — View Outlook email template files • EML — Read standard email message files from most email clients • XPS / OXPS — Open Microsoft XML Paper Specification documents with a smooth, PDF-like reading experience WHAT YOU CAN EXTRACT • Attachments including PDF, Word (DOC/DOCX), Excel (XLS/XLSX), PowerPoint (PPT/PPTX) • Images (JPG, PNG, GIF, TIFF, and more) • Rich Text (RTF) and HTML-formatted messages • Embedded files and hidden Outlook content KEY FEATURES • Instantly open Winmail.dat (TNEF), MSG, OFT, XPS/OXPS, and EML files • View fully formatted messages with original layout preserved • Extract and share attachments in seconds • Reply to or forward messages directly from the app • Search by subject, sender, or keyword • Save and organize files with fast SwiftData storage • Dark Mode for comfortable reading • Full integration with the iOS Files app No more “winmail.dat” confusion. Open, decode, extract, and share Outlook attachments effortlessly. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

ShelfCheck Pro

Features
Read full description

Never buy the same book twice. ShelfCheck is the fastest way to check if you already own a book before you buy it. Just point your iPhone at the barcode, and in under a second you get a clear answer: red for owned, green for new, amber for a possible different edition. Built for book collectors, avid readers, and anyone who has ever come home from a bookstore only to realize they already had that book on the shelf. KEY FEATURES Instant Duplicate Check Scan any ISBN barcode and get immediate feedback. Three-layer matching checks exact ISBN, title and author fuzzy match, and online database lookup to catch duplicates even across different editions. Works Offline No Wi-Fi at the used book sale? No problem. ShelfCheck checks your entire local library instantly without an internet connection. Online metadata lookup happens in the background when you are back online. Zero Friction No account to create, no cloud service to sign up for, no social features to distract you. Open the app and start scanning. Your data stays on your device. Continuous Scan Mode Toggle continuous mode to scan dozens of books in minutes. Each scan shows instant feedback and automatically moves to the next. Perfect for cataloging an entire bookshelf or browsing a library sale. Your Book Library Browse all your books in a clean list view. Search by title, author, or ISBN. Sort by date added, title, or author. Filter by tags to find any book in seconds. Book Details and Notes Tap any book to see full details including cover, publisher, page count, and more. Add personal notes, mark books as read, and track which books you have lent out and to whom. Custom Tags and Lending Tracker Organize your collection with custom tags. Track lent books with borrower name and date. Never lose track of who has your favorite novel again. CSV Export Export your entire library as a CSV file for backup or import into other tools. Your data, your way. Manual Book Entry No barcode? No problem. Add books manually by entering the title, author, and ISBN. The app will still check for duplicates and look up metadata automatically. Smart ISBN Handling Automatically normalizes ISBN-10 and ISBN-13 formats. Handles hyphens, spaces, and prefix variations so you never miss a match. Default Shelf Location Set a default shelf location in Settings so every new book is automatically assigned to the right spot on your bookshelf. PRIVACY FIRST ShelfCheck collects no personal data. No analytics, no tracking, no third-party sharing. Your book library is your business. FREE TO USE Scan and check books with no limits. Store up to 50 books for free. Upgrade to Pro for unlimited books, continuous scan, custom tags, lending tracker, and CSV export. PRO SUBSCRIPTION Unlock the full power of ShelfCheck with a Pro subscription: - Monthly: $1.99/month - Yearly: $9.99/year (58% savings) - Lifetime: $19.99 one-time purchase All Pro plans include a 7-day free trial (monthly and yearly). SUBSCRIPTION INFORMATION: - Payment will be charged to your Apple ID account at confirmation of purchase. - Subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. - You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase. - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription.

Screenshots

Winmail Viewer4 screens
ShelfCheck Pro4 screens

Verdict

The call

Winmail Viewer and ShelfCheck Pro are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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 4 in-app purchases, starting at $1.99 per month and ShelfCheck Pro sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
Winmail Viewer versus ShelfCheck Pro: the parameters behind the verdict, then further details
ParameterWinmail ViewerShelfCheck Pro
PriceFreeFree
Rating4.7 (19 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings19 — better—
Update frequencyEvery 9 days—
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS1717
Further details — not scored
Size25 MB2 MB
Age rating4+4+
Developer延平 陈贺 周

In-app purchases

4 purchases

Winmail Viewer

Subscriptions3
  • Premium Monthly$1.991 Month
  • Premium Weekly$1.997 Days
  • Premium Yearly$5.991 Year
One-time1
  • Lifetime Premium Access$9.99
3 purchases

ShelfCheck Pro

Subscriptions2
  • Pro Monthly$1.991 Month
  • Pro Yearly$9.991 Year
One-time1
  • Pro Lifetime$19.99

Questions

Is Winmail Viewer free?
Winmail Viewer is free to download, with in-app purchases available.
Is ShelfCheck Pro free?
ShelfCheck Pro is free to download, with in-app purchases available.
Do Winmail Viewer or ShelfCheck Pro have ads?
Neither Winmail Viewer nor ShelfCheck Pro shows ads.

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