65
BU Score
Solid
Secret Folder - Password Lock
✍️ bumetric analysis
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Secret Folder - Password Lock is an iOS app from Tung Nguyen in the Utilities category, currently rated 4.6★ across 72 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Our BU Score puts it at 65: Solid (established niche player). For a Utilities app, that means established niche player.
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
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Reviews
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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 6 of 6 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 | |
| Excellent rating (4.6★)METRIC | +$2,200 | |
| 5 starREVIEW | +$1,800 | |
| Mature app (11y old)METRIC | +$1,500 | |
| Single-language (English only)METRIC | −$400 | |
| Pre-traction phase (72 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 →💾 24 MB🔞 4+📱 iOS 10.0+🔖 v1.5🔄 updated 6y ago🌐 EN📂 Utilities💰 Paid🚀 Launched 2014 (11y old)
📝 About this app
Hide your photos and videos in a secret folder protected with password.
- Import content from your device's camera roll.
- Take a picture or capture a video, it's PRIVATE.
- Create and manage your albums.
- Decoy password: setup some fake photos as a second defense.
- Export content to your phone
- Create secret notes for things to remember like link, text or contact.
- Disguise your app as a calculator
Enjoy watching your videos with full privacy and security.
- Import content from your device's camera roll.
- Take a picture or capture a video, it's PRIVATE.
- Create and manage your albums.
- Decoy password: setup some fake photos as a second defense.
- Export content to your phone
- Create secret notes for things to remember like link, text or contact.
- Disguise your app as a calculator
Enjoy watching your videos with full privacy and security.
🆕 What's New · v1.5
- Add a (optional) Calculator disguise
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Secret Folder - Password Lock
- Developer
- Tung Nguyen
- Bundle ID
- com.grumpystudio.CalculatorPlus
- App Store URL
- Open in App Store
- Category
- Utilities
- Content rating
- 4+
- Languages
- EN
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
- $10.4K/mo
- Top-grossing rank
- Outside top 100 in US Utilities
- 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/id1406503654
⭐Recent App Store Reviews8 latest · avg 3.62★ · 37.5% 5★ · 25.0% 1★
5★3 (38%)
4★3 (38%)
3★0 (0%)
2★0 (0%)
1★2 (25%)
+0 ratings/week
Praise: great ×4 recommend ×1 love ×1Complaints: crash ×1
Top positive
★★★★★ Good vault saving app
This photo app is good at keeping your things safe: including photos and videos. One thing I would recommend would be able to organize the photos and be able to move them in the album you have them in. Right now once you add them, you can’t…
★★★★★ Problems with password
I Love this app but know with the update I cant even enter its asking me for a password that I put with pin and know it says wrong password can u guys fix this problem plz. Add options if they want to use pin or use words as password…
Top negative
★☆☆☆☆ Why?
It was great when it was a calculator. Why’d you idiots change it?…
★☆☆☆☆ Unstable App
The app crashes in unexpected ways at all the wrong times. I miss my 99 cents.…
📈Ratings growth72 ratings+7100% lifetimeShow 3-year history estimate ▾
Tracked (10 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 Secret Folder - Password Lock: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.