Out of 0+ METAR viewer apps on iOS, 18 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
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.
This app offers advanced weather forecasting with over 50 detailed maps and 15 weather models, including live radar, satellite imagery, and hurricane tracking. It provides customizable alerts for storms, wind, and snow, making it ideal for outdoor activities and aviation.
Easily open and explore 3D model files on your iPhone or iPad. Supports over 20 popular formats, offering smooth viewing with intuitive touch controls. Ideal for designers, engineers, architects, and students working with 3D data.
Winmail Viewer - Letter Opener tops our METAR viewer apps ranking as of June 2026, with a 4.8-star average from 4.8K App Store ratings, and it's free to download.
Are there free METAR viewer apps for iPhone?
Yes — 18 of the top METAR viewer apps we rank are free to download, including Winmail Viewer - Letter Opener and Windy.com.
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 June 2026.
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.