21
BU Score
Niche
Winmail Opener
✍️ bumetric analysis
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Winmail Opener is an iOS app from 科 姚 in the Business category, currently rated 1.8★ across 5 ratings. Initial signal reads as mostly critical sentiment so far: users flag rough edges and unmet expectations.
Our BU Score puts it at 21: Niche (micro-niche or pre-traction stage). For a Business app, that means micro-niche or pre-traction stage.
Track changes month-over-month in the Performance section below: live snapshot history and revenue forecast included.
📊 Performance Tracking LIVE
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Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
Range:
💰 Forecast Revenue / mo
MODELRevenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 5 of 5 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Paid app ($0.00)METRIC | +$2,800 | |
| Below-average rating (1.8★)METRIC | −$1,500 | |
| Mature app (10y old)METRIC | +$1,500 | |
| Localized (8 languages)METRIC | +$600 | |
| Pre-traction phase (5 ratings)METRIC | −$300 |
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)
📈 Reviews Growth
LIVECumulative review count from first BU snapshot. Each point = a tracked update.
⭐ Rating Trend
LIVEAverage rating evolution. Updates with each new review batch.
🗓️ Snapshot Timeline
HISTORYEach bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →💾 2 MB🔞 4+📱 iOS 7.0+🔖 v1.0🔄 updated 10y ago🌐 EN, FR, DE, IT, PT +3📂 Business💰 Paid🚀 Launched 2015 (10y old)
📝 About this app
Winmail Opener helps you instantly open and view winmail.dat attachment.
Sometimes you got an email with an attachment named 'Winmail.dat', you don't even know what it is.
Actually if you receive an email message sent from a Microsoft email app such as Outlook or Microsoft Exchange, the message might include an attachment with "winmail.dat" in the name.
You don't need to ask the sender to resend the mail in plain text or HTML, simply open the winmail.dat file with Winmail Opener, you can view the original mail content and all the attachments instantly.
Key Features:
* Open winmail.dat file, lets you view, open or export files within the winmail.dat.
* Easy-to-use application, you can open a file, drag and drop files to it.
* Simple and fast, decode and view winmail.dat file instantly without waiting.
Sometimes you got an email with an attachment named 'Winmail.dat', you don't even know what it is.
Actually if you receive an email message sent from a Microsoft email app such as Outlook or Microsoft Exchange, the message might include an attachment with "winmail.dat" in the name.
You don't need to ask the sender to resend the mail in plain text or HTML, simply open the winmail.dat file with Winmail Opener, you can view the original mail content and all the attachments instantly.
Key Features:
* Open winmail.dat file, lets you view, open or export files within the winmail.dat.
* Easy-to-use application, you can open a file, drag and drop files to it.
* Simple and fast, decode and view winmail.dat file instantly without waiting.
🆕 What's New · v1.0
This update from Apple will improve the functionality of this app. No new features are included.
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Winmail Opener
- Developer
- 科 姚
- Bundle ID
- com.lightenpdf.winmaildatios
- App Store URL
- Open in App Store
- Category
- Business
- Content rating
- 4+
- Languages
- EN, FR, DE, IT, PT, ZH, ES, ZH
Company
- Website
- Not found
- Tagline
- Today
- Description
- Find apps and games for iPhone, iPad, Mac, and more on the App Store.
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- OG image
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $201/mo
- Top-grossing rank
- Outside top 100 in US Business
- All-time revenue
- Not found
- Pricing
- Not found
Founder
- Name
- Not found
- X / Twitter
- Not found
- Not found
- GitHub
- Not found
- X followers
- Not found
- Public statements
- Not found
Funding
- Total raised
- Not found
- Last round
- Not found
- Investors
- Not found
- Crunchbase
- Not found
- AngelList
- Not found
Press & Links
- Articles found
- Not found
- Listed on
- Not found
- Blog
- Not found
- Press / News
- Not found
Contacts & Socials
- Socials
- Not found
- Not found
- Phone
- Not found
- Contact page
- Not found
- About page
- https://apps.apple.com/us/iphone/story/id1895675718
⭐Recent App Store Reviews2 latest · avg 1.0★ · 0% 5★ · 100.0% 1★
5★0 (0%)
4★0 (0%)
3★0 (0%)
2★0 (0%)
1★2 (100%)
+0 ratings/week
Top positive
★☆☆☆☆ Doesn't open any attachments
Complete waste of money. I hope they update this app soon because it definitely doesn't do what it's advertised to do.…
★☆☆☆☆ Ripped off
Totally doesn't work as advertised. Apple please remove or clarify that it does NOT open all attached files. Calendar files don't work. Only SOME files work.
If I could give zero stars I would but I guess it gets one for text …
Top negative
★☆☆☆☆ Doesn't open any attachments
Complete waste of money. I hope they update this app soon because it definitely doesn't do what it's advertised to do.…
★☆☆☆☆ Ripped off
Totally doesn't work as advertised. Apple please remove or clarify that it does NOT open all attached files. Calendar files don't work. Only SOME files work.
If I could give zero stars I would but I guess it gets one for text …
📈Ratings growth5 ratings+400% lifetimeShow 3-year history estimate ▾
Tracked (4 weeks) Pre-tracking estimate (37 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.
Full revenue analysis
Read the article-style breakdown for Winmail Opener: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.