65
Quality Score
Solid
Kilonotes-Notes & Mark up PDF
Medium confidence
✍️ bumetric analysis
“
Kilonotes-Notes & Mark up PDF is an iOS app from Hefei T-Stack Information Technology Co., Ltd. in the Productivity category, currently rated 4.6★ across 4,840 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Quality Score is 65: Solid (established niche player). For a Productivity app, that means established niche player. The full BU Investment Matrix below scores 8 dimensions including monetisation, growth, and operational risk.
Track changes month-over-month in the Performance section below: live snapshot history and revenue forecast included.
💰 Monthly revenue · now vs forecast
● Right now
$5.0K
per month
→
12-mo forecast
$5.2K – $10.8K
per month
→
24-mo forecast
$6.4K – $19.2K
per month
MID tierSUBSCRIPTION
💡 Grow this revenue
Free AI audit of this app’s store listing
- Title & subtitle keyword fit
- Description hook & conversion structure
- Screenshots, ratings, reviews strategy
Typical impact: +2-5× organic installs
📊 Performance Tracking LIVE
Loading…
Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
ONE-TIME · BUILD💰 Estimated build cost
$135K
↳ What it cost to build · not monthly revenue
Likely range $100K – $180K
$25K · MVP floor$100K · indie scale$500K+ · studio build
📈Slow ROI — current MRR is well below build cost
Synthetic estimate. Inputs: category complexity, file size, screen count, monetization layer, platform reach, age × team-size proxy. Calibrated against 2024-2026 indie-agency rate surveys. Full math + source list on /methodology.
Where the money goes
| 🧱MVP baseline (design + 1-store ship) | +$28K |
| 📱5 unique screens × $4.5K | +$22K |
| 📦Asset bundle (471 MB) | +$40K |
| ⚙Productivity complexity ×1.10 | +$9K |
| ⚙5.9y maintenance × ~1-person team | +$35K |
Total estimate$135K
👥 Estimated audience size
255K
Lifetime downloads (US-equivalent)
Monthly active
58K
Daily active
26K
Synthetic estimate from ratings × category benchmarks. Calibrated against 2024-2026 mobile-attribution retention + DAU/MAU reports. Numbers are US-storefront-equivalent — true global audience can be 5-10× larger for international apps. Full math + source list on /methodology.
How we sized it
| 📲Productivity engagement | ~75 installs / rating |
| 📅5.9y of rating accumulation | -30% |
| 🔁Productivity D30 retention | 30% |
| 📍DAU / MAU stickiness | 0.45 |
DAU / MAU45% sticky
🛠 Estimated tech stack
🍎
Native iOS (SwiftUI)
Medium confidence · 55%
Also possible
React NativeFlutter
Heuristic guess from app bundle size, category, store description signals, and release-date stack era. Bumetric does not disassemble binaries — for binary-level certainty you would need an SDK intelligence tool or the manifest itself. Reasoning chain on the right. Full ruleset on /methodology.
Signals we read
| 📦App bundle size | 471 MB |
| 🏷Category context | Productivity |
| 📦Large iOS bundle | → Native SwiftUI (post-2020 era) + assets |
💀 Maintenance status
Active
5%
Last shipped 2026-04-27 · 28 days ago
0 · Active50 · At risk100 · Abandoned
Heuristic risk score from time-since-last-update + ratings velocity proxy + Editor's Choice / curated featuring signals. Calibrated against 2024-2025 app-store ranking decay reports. Not a guarantee — a quiet app with a healthy codebase looks the same as an abandoned one until something breaks. Full math on /methodology.
Risk signals
| 📅28 days since last update | Active development |
VerdictActive
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$5.0K/mo · ML-estimated from 234 triggers
Growth rate
+4.0% MoM · MID tier baseline (compound monthly)
Direction
Tailwinds: monetization model proven
6 months
$4.7K – $7.9K
12 months
$5.2K – $10.8K
24 months
$6.4K – $19.2K
Compound growth at +4.0% MoM (tier baseline for MID). Range widens with horizon — typical noise band ±25% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.
📊
BU Investment Matrix
Below median · 54/100MID TIERSUBSCRIPTIONunderperforming peersRevenue Strength
3.7
Product Quality
6.9
Market Position
2.0
Growth Velocity
5.0
Defensibility
6.0
Operational Safety
6.9
Founder Strength
3.0
Monetization Maturity
9.5
- 💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.64★ across 4,840 reviews — solid.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: Insufficient signal to assess trajectory.
- ⚠️ Risk: Moderate — rating drift -0.96 ★ (recent 50 vs lifetime).
🎯 For competitors: Mixed picture. Worth competing if you have a clear UX or pricing edge — otherwise crowded segment.
💵 For acquirers: Estimated asking range 18-32× monthly = $90K-$160K.
Composite of 8 dimensions computed deterministically from public signals — no LLM, every score traces back to a measurable input. Default weights shown; "compete" / "acquire" / "invest" lenses re-weight without re-fetching.
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 11 of 11 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Excellent rating (4.6★)METRIC | +$2,200 | |
| bugsREVIEW | −$1,800 | |
| 5 starREVIEW | +$1,800 | |
| Low install base (4,840 ratings)METRIC | +$1,500 | |
| Multilingual (22 languages)METRIC | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| slowREVIEW | −$1,200 | |
| annoying adsREVIEW | −$1,100 | |
| too expensiveREVIEW | −$1,000 | |
| Established app (5y old)METRIC | +$800 | |
| Ad-supported / freemiumMETRIC | +$600 |
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.
App Specs
🔐 Own this app? Claim & verify MRR →💾 471 MB🔞 4+📱 iOS 15.6+🔖 v3.39.1🔄 updated 4w ago🌐 AR, CS, NL, EN, FR +17📂 Productivity💰 Free🚀 Launched 2020 (5y old)
📝 About this app
We sincerely invite you to join us in exploring more efficient ways of taking notes and jointly reshape the modern learning mode. As a companion exploring new ways of taking notes, Kilonotes can meet your various needs. Whether it is recording class notes, annotating PDFs, doing test exercises, studying online courses, or organizing reading notes, Kilonotes will be your reliable study partner. Let's take good notes together.
[Breakthrough the limitations of paper]
·Handwriting can be moved, scaled and rotated freely
・You can undo what you entered… View full description on the official store →
[Breakthrough the limitations of paper]
·Handwriting can be moved, scaled and rotated freely
・You can undo what you entered… View full description on the official store →
📅
What Worked™ · Development Pipeline
10 EVENTS TRACKEDDetected changes in this app over its tracked lifetime — each event links cause (what changed) to effect (what moved). Sorted newest first.See full history →Version history →
2026-05
⭐
Rating ↑ 4.02 → 4.64 (improved 0.62★)
2026-05
📈
Crossed 1,000 ratings — social-proof flywheel kicking in
2026-03
📈
Crossed 500 ratings — social-proof flywheel kicking in
2026-03
⭐
Rating ↑ 4.02 → 4.70 (improved 0.68★)
2024-06
📈
Crossed 100 ratings — social-proof flywheel kicking in
2024-05
📈
Crossed 50 ratings — social-proof flywheel kicking in
2023-10
📈
Crossed 10 ratings — social-proof flywheel kicking in
2023-09
⭐
Rating ↓ 4.83 → 4.29 (dropped 0.54★)
2023-08
⭐
Rating ↓ 5.00 → 4.67 (dropped 0.33★)
2023-08
🚀
First tracked snapshot — initial data captured
🔎
ASO Keyword Positions
BEST RANK #24Ranked for 1 App Store search query in our last keyword sweep. Lower position = closer to the top.
note taking·#24🇺🇸
Last sweep: 2026-05-19 · iTunes Search API
🗣
Voice of Customer
Based on 850 reviews across 9 markets● 72% positive · ● 14% neutral · ● 14% negative · Rating drift: -0.96★ (declining — recent 50: 3.68★ vs lifetime: 4.64★)
VADER compound sentiment per quarter (−1 = fully negative, +1 = fully positive). Each point ≥ 5 reviews.
Sentiment by country (−1 to +1)
🇦🇺 AU
+0.71
🇬🇧 GB
+0.64
🇺🇸 US
+0.58
🇨🇦 CA
+0.50
🇮🇳 IN
+0.48
🇫🇷 FR
+0.26
🇯🇵 JP
+0.13
🇧🇷 BR
+0.00
🇩🇪 DE
-0.05
Top praise themes
note taking ×68 apple pencil ×14 highly recommend ×12 please add ×8 features free ×8 sehr gut ×8 ich finde ×8 mostly free ×7
Top complaint themes
note taking ×9 permanent membership ×8 ads bottom ×5 bottom screen ×5 now ads ×5 ads paid ×5 added ads ×5 apple pencil ×4
Risk signals
Subscription complaints: 3%
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇺🇸 US | 4.63889★ | 4,849 | 4.63889★ this version |
| 🇬🇧 GB | 4.58877★ | 766 | 4.58877★ this version |
| 🇩🇪 DE | 4.53985★ | 1,719 | 4.53985★ this version |
| 🇫🇷 FR | 4.57785★ | 289 | 4.57785★ this version |
| 🇯🇵 JP | 4.56667★ | 210 | 4.56667★ this version |
| 🇨🇦 CA | 4.55428★ | 608 | 4.55428★ this version |
| 🇦🇺 AU | 4.56749★ | 363 | 4.56749★ this version |
| 🇧🇷 BR | 4.51538★ | 520 | 4.51538★ this version |
| 🇮🇳 IN | 4.485★ | 1,200 | 4.485★ this version |
🔔
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Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Kilonotes-Notes & Mark up PDF
- Developer
- Hefei T-Stack Information Technology Co., Ltd.
- Bundle ID
- com.topstack.HandNote
- App Store URL
- Open in App Store
- Category
- Productivity
- Content rating
- 4+
- Languages
- AR, CS, NL, EN, FR, DE, EL, ID, IT, JA, KO, MS, PL, PT, RU, ZH, ES, TH, ZH, TR, UK, VI
Company
- Website
- Not found
- Tagline
- Not found
- Description
- Not found
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- Not found
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $256/mo
- Top-grossing rank
- Outside top 100 in US Productivity
- All-time revenue
- Not found
- Pricing
- Not found
Founder
Founder data not yet collected for this app.
Funding
Funding data not yet collected for this app.
Press & Links
Press & Links data not yet collected for this app.
Contacts & Socials
Contacts & Socials data not yet collected for this app.
📈Ratings growth4,840 ratings+62% lifetimeShow 3-year history estimate ▾
Tracked (50 weeks) Pre-tracking estimate (36 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.
Similar apps in Productivity
Full revenue analysis
Read the article-style breakdown for Kilonotes-Notes & Mark up PDF: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
About this analysis
Why medium confidence: 4,840 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
9 answers · auto-generated from this app's public dataHow much does Kilonotes-Notes & Mark up PDF make per month?▴
Based on our ML-calibrated revenue forecast, Kilonotes-Notes & Mark up PDF earns approximately $255/mo. This is a US-storefront-equivalent estimate; global revenue can be several times larger for internationally-distributed apps. See the methodology page for the full formula and confidence bands.
Is Kilonotes-Notes & Mark up PDF profitable?▴
With estimated build cost $135K and monthly revenue $255, Kilonotes-Notes & Mark up PDF looks well below break-even — current monthly revenue is much smaller than the estimated build cost. Profitability also depends on paid-acquisition spend and refund rate which the public model doesn't see.
How many users does Kilonotes-Notes & Mark up PDF have?▴
Estimated audience: ~255K lifetime downloads, ~58K monthly active users, and ~26K daily active users. Derived from ratings count × category installs-per-rating × age decay. US-storefront-equivalent — global audience can be 5-10× larger for internationally-distributed apps.
What apps are like Kilonotes-Notes & Mark up PDF?▴
Browse the full Productivity category catalog to find similar apps with revenue, build cost, audience and tech stack data. Each /p/{slug} page also shows a Compare side-by-side widget with three peer apps from the same niche.
What is Kilonotes-Notes & Mark up PDF built with?▴
Our heuristic places Kilonotes-Notes & Mark up PDF on the Native iOS (SwiftUI) stack (Medium confidence, 55%). Signals: app bundle size, category context, store-description markers, release-date era. We don't disassemble binaries. Alternative possibilities: React Native, Flutter.
Is Kilonotes-Notes & Mark up PDF still actively maintained?▴
Maintenance status: Active (5% abandonment risk). Last shipped version was 28 days ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.
When was Kilonotes-Notes & Mark up PDF last updated?▴
Kilonotes-Notes & Mark up PDF last shipped a new version on 2026-04-27 — less than a month ago. This is the date Apple / Google last accepted a new build, not a content-only push.
Who makes Kilonotes-Notes & Mark up PDF?▴
Kilonotes-Notes & Mark up PDF is published by Hefei T-Stack Information Technology Co., Ltd. on the Apple App Store. See the full publisher portfolio (other apps by the same developer) via the More by developer block on the product page above.
What is Kilonotes-Notes & Mark up PDF's BU Score?▴
Kilonotes-Notes & Mark up PDF has a BU Score of 65/100 (Solid). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.