29
BU Score
Niche
Knife Collection
✍️ bumetric analysis
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Knife Collection is an iOS app from Frederik Drosdzol in the Productivity category, currently rated 2.6★ across 5 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Our BU Score puts it at 29: Niche (micro-niche or pre-traction stage). For a Productivity 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 (2.6★)METRIC | −$1,500 | |
| Mature app (9y old)METRIC | +$1,500 | |
| slowREVIEW | −$1,200 | |
| 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 →💾 3 MB🔞 4+📱 iOS 8.0+🔖 v1.1🔄 updated 9y ago🌐 EN, DE📂 Productivity💰 Free🚀 Launched 2016 (9y old)
📝 About this app
A unique collection deserves optimal organization!
Keep track of your knife collection and its value on the go and when meeting other collectors. Well organized and always available.
Add new knives with your own pictures and notes including details such as:
- Brand
- Model
- Price
- Steel
- Weight
- Overall length
- Blade length
- Blade width
- Blade grind
- Blade angle
- Scale material
- Purchase date
- Purchased from
- Legal to carry
- Lock
- Sold to
- Sold for
- Notes
Four appealing color themes are available.
Keep track of your knife collection and its value on the go and when meeting other collectors. Well organized and always available.
Add new knives with your own pictures and notes including details such as:
- Brand
- Model
- Price
- Steel
- Weight
- Overall length
- Blade length
- Blade width
- Blade grind
- Blade angle
- Scale material
- Purchase date
- Purchased from
- Legal to carry
- Lock
- Sold to
- Sold for
- Notes
Four appealing color themes are available.
🆕 What's New · v1.1
This update from Apple will improve the functionality of this app. No new features are included.
- Bugfixes
- Showing version number
- Bugfixes
- Showing version number
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Knife Collection
- Developer
- Frederik Drosdzol
- Bundle ID
- collection.com.KnifeCollection
- App Store URL
- Open in App Store
- Category
- Productivity
- Content rating
- 4+
- Languages
- EN, DE
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
- $1.9K/mo
- Top-grossing rank
- Outside top 100 in US Productivity
- 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/id1583092806
⭐Recent App Store Reviews2 latest · avg 3.0★ · 50.0% 5★ · 50.0% 1★
5★1 (50%)
4★0 (0%)
3★0 (0%)
2★0 (0%)
1★1 (50%)
+0 ratings/week
Praise: great ×2
Top positive
★☆☆☆☆ Good foundation - minimal functionality
The idea is good but right now (v1.1) the app is little more than a nicely colored blank page on which you take notes.
The app would greatly benefit from having a catalogue of existing knives (at least production knives from the past few …
★★★★★ Great product could use some minor improvements
The overall user interface is pretty good, sometimes the information listed is not available from the manufacturer, perhaps if there were a few open drop down menus that were customizable for info the manufacturer provides but you don’t hav…
Top negative
★☆☆☆☆ Good foundation - minimal functionality
The idea is good but right now (v1.1) the app is little more than a nicely colored blank page on which you take notes.
The app would greatly benefit from having a catalogue of existing knives (at least production knives from the past few …
★★★★★ Great product could use some minor improvements
The overall user interface is pretty good, sometimes the information listed is not available from the manufacturer, perhaps if there were a few open drop down menus that were customizable for info the manufacturer provides but you don’t hav…
📈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.
More by Frederik Drosdzol
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Full revenue analysis
Read the article-style breakdown for Knife Collection: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.