With an average user rating of 4.0★, the winmail category is one of the App Store's strongest. Browse all 247+ apps we track, sorted so the most loved ones surface first.
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.
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.
Consolidate all your email accounts into a single, organized inbox. Prioritize important messages, quickly respond with smart replies, and manage your inbox efficiently with features like scheduling and snoozing. Enjoy enhanced privacy with IP address hiding and read receipt prevention.
Winmail Viewer - Letter Opener tops our winmail apps ranking as of July 2026, with a 4.8-star average from 4.5K App Store ratings, and it's free to download.
Are there free winmail apps for iPhone?
Yes — 17 of the top winmail apps we rank are free to download, including Winmail Viewer - Letter Opener and Winmaildat Opener.
Does Winmail Viewer - Letter Opener have ads or in-app purchases?
Winmail Viewer - Letter Opener has no ads and offers in-app purchases, according to its App Store listing as of July 2026.
How many winmail apps are on the App Store?
We track 247+ winmail apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
What does this app do?
This app allows you to open and view Winmail.dat, MSG, and XPS email files that are typically unreadable by other email applications. It converts embedded content like appointments and notes into formats compatible with your iOS device and provides access to all attachments.
How do I open a Winmail.dat file?
Simply tap on the Winmail.dat file when you receive it, and the app will open it automatically. It then processes the file to make its content accessible, including any attachments or embedded items like calendar events.