{"app_store_id":411897373,"slug":"winmail-viewer-letter-opener-411897373","name":"Winmail Viewer - Letter Opener","subtitle":null,"icon_url":"https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/24/70/49/24704949-ed46-fe43-4317-d40730e06d39/AppIcon-0-0-1x_U007epad-0-1-0-sRGB-85-220.png/512x512bb.jpg","store_url":"https://apps.apple.com/us/app/winmail-viewer-letter-opener/id411897373?uo=4","price":0,"currency":"USD","rating":4.74754,"rating_count":4971,"in_app_purchases":null,"recent_rating":null,"recent_review_count":null,"reviews_checked_at":null,"primary_genre":"Utilities","version_date":"2026-10-03T21:07:24Z","updated_at":"2026-10-21T03:36:12.818Z","stale":false,"missing_since":null,"one_liner":"Opens Winmail.dat, MSG and XPS files from Outlook and converts their contents to iOS native formats.","verified_maker":false,"maker_site":null,"file_size_bytes":54994944,"minimum_os":"15.0","content_rating":"4+","language_count":12,"screenshots":["https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/53/f2/5d/53f25d36-7da9-70c8-58a0-85d31a53f76e/c856231e-426a-4136-affd-bfa3d19d7dbc_LetterOpener-iPhone55-01.png/406x228bb.png","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/c5/d0/1a/c5d01a97-0487-9dd3-3b8e-8d56320d9c01/bc78728a-5c51-4749-a721-6383826e7a77_LetterOpener-iPhone55-03.png/406x228bb.png","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/94/a8/00/94a800b8-44f2-55db-63e8-a164b7d87cfe/3f33d858-5e56-4943-ba20-a925388d4e18_LetterOpener-iPhone55-04.png/406x228bb.png","https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/89/f9/df/89f9df60-788b-91ab-52ad-3385f6b832bc/5447cb59-25b8-4d4b-8311-b23e0d751e51_LetterOpener-iPhone55-05.png/406x228bb.png"],"developer_name":"Letter Opener GmbH","editors_choice":null,"url":"https://apptierlist.com/apps/winmail-viewer-letter-opener-411897373/","api_url":"https://apptierlist.com/api/v1/apps/winmail-viewer-letter-opener-411897373","schema_version":"1.0","generated_at":"2026-10-23T05:13:43.495Z","data_as_of":"2026-10-22T18:25:19.308Z","description":"Open Winmail.dat, MSG and XPS files with just a tap. \n\nABOUT\nA winmail.dat file or MSG file is an email from Microsoft Outlook that can not be read by other email applications. It needs to be converted for the content to be accessible. \n\nLetter Opener does that with a simple tap!\n\nWith over 10 years experience (and a special dislike for winmail.dat files) we made sure that working together with Microsoft Outlook and Windows users can be simple and seamless.\n\nFEATURES\n- Open Winmail.dat and MSG files and convert appointments, notes, contacts etc. to iOS native formats.\n\n- Get access to all attachments in Winmail.dat files.\n\n- Export files to another app.\n\nSUPPORT\nWe provide direct personal support, so don’t hesitate to contact us if you have any questions or comments: support@winmail.help\n\nThanks for helping us to keep improving Letter Opener!\n\nTERMS OF USE\nhttps://winmail.help/legal/terms","facts":{"developer_id":373066203,"developer_url":"https://winmail.help/letter-opener-for-ios?utm_source=LetterOpenerMobile&utm_medium=AppStore","first_released":"2010-12-31T20:11:29Z","support_url":null,"privacy_url":null,"website_url":null,"app_version":"17.1.2","release_notes":"Improved Winmail.dat, MSG and XPS file support.\n\nIf you like Letter Opener, please consider leaving a review. That helps us a lot. Thanks!","rating_current_version":4.74754,"rating_count_current_version":4971,"star_counts":null,"genres":["Utilities","Productivity"],"languages":["NL","EN","FR","DE","IT","JA","KO","PT","ZH","ES","SV","ZH"],"content_advisories":null,"device_families":null,"made_for_iphone_duo":null,"chart":null},"freshness":{"apple_read_at":"2026-10-21T03:36:12.818Z","catalog_read_at":null,"reviews_checked_at":null,"summary_written_at":"2026-10-19T10:29:11.897Z","placed_at":"2026-10-18T02:39:11.692Z","scored_at":"2026-10-22T18:25:19.308Z"},"editorial":{"one_liner":"Opens Winmail.dat, MSG and XPS files from Outlook and converts their contents to iOS native formats.","what_is":"Letter Opener is a utility app that opens Winmail.dat and MSG files, which are Microsoft Outlook emails that other email applications cannot read. It converts appointments, notes and contacts to iOS native formats and gives access to all attachments in Winmail.dat files. Files can also be exported to another app.","good_for":["Reading a Winmail.dat email received from an Outlook user","Accessing attachments inside a Winmail.dat file","Converting appointments, notes or contacts from an MSG file"],"pricing":"Winmail Viewer - Letter Opener is free to download on the App Store.","faq":[{"q":"What file types does the app open?","a":"It opens Winmail.dat, MSG and XPS files. It converts appointments, notes and contacts to iOS native formats and gives access to Winmail.dat attachments."},{"q":"Does the app cost money?","a":"It is free to download. No in-app purchases are listed on the App Store."},{"q":"How can I get support?","a":"The listing states direct personal support is provided at support@winmail.help. Terms of use are at https://winmail.help/legal/terms."}],"model":"claude-haiku-5-5","created_at":"2026-10-19T10:29:11.897Z"},"memberships":[{"list":"file-opening","list_name":"file opening","list_status":"active","list_url":"https://apptierlist.com/best/file-opening/","position":4,"tier":"S","score":90,"components":{"rating":94.4,"votes":80.3,"rank":85.4,"recency":100},"status":"active","review_status":"checked","list_ranking_status":"ranked","confidence":"normal","judged_at":"2026-10-18T02:39:11.692Z"}],"main_list":"file-opening","claim":{"status":"none","verified":false,"site_url":null,"verified_via":null,"verified_domain":null},"maker":null,"history":[{"id":162920,"at":"2026-10-18T14:27:11.693Z","kind":"tier_changed","list":"file-opening","app_store_id":411897373,"app":"winmail-viewer-letter-opener-411897373","from":null,"to":"S","reason":"score 68.4 to 90.2","job":"rescore"},{"id":150644,"at":"2026-10-18T02:39:11.692Z","kind":"membership_added","list":"file-opening","app_store_id":411897373,"app":"winmail-viewer-letter-opener-411897373","from":null,"to":"active","reason":"Its main job is opening Winmail.dat, MSG and XPS files that iOS cannot open by default, and giving access to their attachments.","job":"shadow"},{"id":141337,"at":"2026-10-17T04:56:13.392Z","kind":"app_added","list":null,"app_store_id":411897373,"app":"winmail-viewer-letter-opener-411897373","from":null,"to":null,"reason":"discovered","job":"import"}],"explain":{"method":"Membership is decided by a model judging the App Store listing against the list's definition (and its excludes, for memberships placed or rechecked since they were added to the prompt); every verdict is listed with its date; the score is a plain average of the public components an app has (four, plus Apple's Editors' Choice badge as 100 where shown); nothing is purchasable.","lists":[{"list":"file-opening","list_name":"file opening","status":"active","review_status":"checked","position":4,"tier":"S","score":90,"components":{"rating":94.4,"votes":80.3,"rank":85.4,"recency":100},"ranks":[{"country":"us","rank":10},{"country":"gb","rank":18},{"country":"ca","rank":18},{"country":"au","rank":15},{"country":"de","rank":17}],"verdicts":[{"verdict":"keep","reason":"Its main job is opening Winmail.dat, MSG and XPS files that iOS cannot open by default, and giving access to their attachments.","verifier":"claude-sonnet-5-5","decided_at":"2026-10-18T02:39:11.692Z","attempts":1,"current":true},{"verdict":"keep","reason":"Its main purpose is opening Winmail.dat, MSG and XPS files, which the phone cannot open by default. 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