Notes Writer Pro: Notiz & PDF
66
Quality Score
Solid
✍️ Bumetric analysis
“
Notes Writer Pro: Notiz & PDF is an iOS app from Kairoos Solutions SL in the Productivity category, currently rated 4.3★ across 447 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Quality Score is 66: 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
$5.2K
per month
→
12-mo forecast
$5.4K – $11.3K
per month
→
24-mo forecast
$6.7K – $20.0K
per month
MID tier
💡 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
82 snapshots on record
Rating
4.3
Reviews
447 reviews
Forecast Revenue / mo
$5.2K
Snapshots tracked
82
since Sep 2018
ONE-TIME · BUILD
💰 Estimated build cost
$150K
↳ What it cost to build · not monthly revenue
Likely range $110K – $200K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Pays back in ~2.4y at current MRR
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 (375 MB) | +$40K |
| ⚙ Productivity complexity ×1.10 | +$9K |
| ⚙ 8.1y maintenance × ~1-person team | +$48K |
Total estimate
$150K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$100K
↳ What it would sell for · not monthly revenue
Marketplace range $75K – $125K · 18× MRR multiple
💸
~0.7× build cost (under-water)
Synthetic estimate. Multiple band derived from ad-supported + age, rating quality, category demand, and user-base maturity. Calibrated against 2024-2026 indie-app-marketplace closed-deal medians. Full math + comparable deal list on /methodology.
How the multiple was built
| 📺 Ad-supported base | 15× MRR |
| 📅 8.1y proven track record | +20% |
| 🏷 Productivity category multiple | +8% |
| ⭐ Small user base (<1K ratings) | -8% |
Final multiple
18× MRR
👥 Estimated audience size
23K
Lifetime downloads (US-equivalent)
Monthly active
4.3K
Daily active
1.9K
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 |
| 📅 8.1y of rating accumulation | -30% |
| 🔁 Productivity D30 retention | 30% |
| 📍 DAU / MAU stickiness | 0.45 |
DAU / MAU
44% sticky
🛠 Estimated tech stack
🍎
Native iOS (Swift / UIKit)
Medium confidence · 55%
Also possible
React Native
Flutter
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 | 375 MB |
| 🏷 Category context | Productivity |
| 📦 Large iOS bundle | → Native Swift / UIKit (pre-2020 era) + assets |
💀 Maintenance status
At risk
40%
Last shipped 2026-06-17 · 98 days ago
0 · Active
50 · At risk
100 · 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
| 📅 3 months since last update | Slowing cadence |
| 👥 Small user base (447 ratings) + 8.1y old | +10% (solo-project pattern) |
Verdict
At risk
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$5.2K/mo · ML-estimated from 234 triggers
Growth rate
+4.0% MoM · MID tier baseline (compound monthly)
6 months
$4.9K – $8.2K
12 months
$5.4K – $11.3K
24 months
$6.7K – $20.0K
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 · 50/100MID TIERunderperforming peersGrowth Velocity
5.0
Founder Strength
6.6
Product Quality
6.0
Revenue Strength
3.7
Monetization Maturity
1.0
Defensibility
5.5
Market Position
2.0
Operational Safety
10.0
- 💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.3★ across 447 reviews — solid.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: Insufficient signal to assess trajectory.
- ⚠️ Risk: Low — no material risk signals detected.
🎯 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 = $93K-$166K. Portfolio play ($79K/mo combined) commands premium.
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 13 of 13 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 | |
| worth every pennyREVIEW | +$2,000 | |
| bugsREVIEW | −$1,800 | |
| 5 starREVIEW | +$1,800 | |
| securityREVIEW | +$1,800 | |
| excellent appREVIEW | +$1,500 | |
| Mature app (8y old)METRIC | +$1,500 | |
| Multilingual (15 languages)METRIC | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| slowREVIEW | −$1,200 | |
| support teamREVIEW | +$900 | |
| Good rating (4.3★)METRIC | +$800 | |
| Early-stage install base (447 ratings)METRIC | +$400 |
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.
🆕 What's New · v26.5.0
* Added support for 9 new app languages, bringing the total to 20: Traditional Chinese, Polish, Thai, Hindi, Dutch, Turkish, Vietnamese, Korean, and Indonesian.
* Improved performance and fixed minor bugs.
* Improved support for PDF, plain text, RTF, and Markdown files.… Full release notes →
* Improved performance and fixed minor bugs.
* Improved support for PDF, plain text, RTF, and Markdown files.… Full release notes →
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Notes Writer Pro: Notiz & PDF
- Developer
- Kairoos Solutions SL
- Bundle ID
- Not found
- App Store URL
- Open in App Store
- Category
- Productivity
- Content rating
- 4+
- Languages
- AR, NL, EN, FR, DE, HI, IT, JA, KO, PT, RU, ZH, ES, ZH, VI
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
- Available
Revenue
- Reported revenue signal / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- Model estimate / mo
- $5.2K/mo
- Top-grossing rank
- Not found
- 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 growth3,209 ratings+2986% lifetimeShow 3-year history estimate ▾
Tracked (60 weeks) Pre-tracking estimate (0 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.
💰Pricing History$0.00 → $9.99 (+0%)
🚀Update Frequency · Releases per Quarter2 releases tracked
🚀Version Release Timeline2 releases tracked
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.
📝 About this app
You have lecture notes to take, a story to tell, article to publish, whether it’s today’s journal entry, tomorrow’s thesis, highlight important things in ebooks and PDFs, fill out a PDF form or get the most from your business meetings. Notes Writer is an excellent assistant in study and business, also being effective for writing down your ideas and thoughts and sharing them!
Students, teachers, writers, doctors, journalists, scholars and business professionals use Notes Writer daily to store notes, annotations, memos, signed PDFs, papers, highlighted PDF text-books, lectures and more.… View full description on the official store →
Students, teachers, writers, doctors, journalists, scholars and business professionals use Notes Writer daily to store notes, annotations, memos, signed PDFs, papers, highlighted PDF text-books, lectures and more.… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 375 MB🔞 4+📱 iOS 16.4+🔖 v26.5.0🔄 updated 3mo ago🌐 AR, NL, EN, FR, DE +10📂 Productivity💰 Paid🚀 Launched 2018 (8y old)
📅
What Worked™ · Development Pipeline
17 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 →
2026-06
🔧
Shipped update — v26.3.0 → v26.5.0
→ 30 days after: reviews +13 medium · co-occurring
2026-05
⭐
Rating ↑ 2.78 → 4.61 (improved 1.83★)
→ 30 days after: reviews +13 medium · co-occurring
2026-05
📈
Crossed 500 ratings — social-proof flywheel kicking in
→ 30 days after: reviews +13 medium · co-occurring
2026-05
💲
Went paid — introduced $9.99 price point
→ 30 days after: reviews +13 medium · co-occurring
2026-03
⭐
Rating ↓ 4.30 → 2.78 (dropped 1.52★)
→ 30 days after: revenue −$30.1K/mo · rating −1.52★ · reviews −203 medium · co-occurring
2026-03
⭐
Rating ↑ 2.78 → 4.30 (improved 1.52★)
→ 30 days after: revenue −$30.1K/mo · rating −1.52★ · reviews −203 medium · co-occurring
2020-06
📈
Crossed 100 ratings — social-proof flywheel kicking in
→ 30 days after: revenue +$450/mo high confidence
2019-09
📈
Crossed 50 ratings — social-proof flywheel kicking in
→ 30 days after: revenue +$969/mo · rating −0.05★ · reviews +9 high confidence
2019-09
📈
Crossed 50 ratings — social-proof flywheel kicking in
→ 30 days after: revenue +$824/mo · rating +0.07★ · reviews +7 high confidence
2019-01
⭐
Rating ↓ 3.82 → 3.42 (dropped 0.40★)
→ 30 days after: revenue +$263/mo · rating −0.25★ high confidence
2018-12
⭐
Rating ↓ 4.18 → 3.82 (dropped 0.36★)
→ 30 days after: revenue +$967/mo · rating −0.40★ · reviews +9 high confidence
2018-11
📈
Crossed 10 ratings — social-proof flywheel kicking in
→ 30 days after: revenue +$679/mo · rating −0.36★ · reviews +6 high confidence
2018-11
⭐
Rating ↓ 4.50 → 4.11 (dropped 0.39★)
→ 30 days after: revenue +$480/mo · rating −0.25★ high confidence
2018-09
🚀
First tracked snapshot — initial data captured
→ 30 days after: revenue +$258/mo medium · co-occurring
2018-09
⭐
Rating ↑ 3.50 → 4.00 (improved 0.50★)
→ 30 days after: revenue +$258/mo medium · co-occurring
2018-09
⭐
Rating ↑ 2.00 → 3.50 (improved 1.50★)
→ 30 days after: revenue +$258/mo medium · co-occurring
2018-09
🚀
First tracked snapshot — initial data captured
→ 30 days after: revenue +$258/mo medium · co-occurring
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇦🇺 AU | 4.56707★ | 164 | 4.56707★ this version |
| 🇧🇷 BR | 4.53171★ | 205 | 4.53171★ this version |
| 🇨🇦 CA | 4.49128★ | 344 | 4.49128★ this version |
| 🇩🇪 DE | 4.28788★ | 462 | 4.28788★ this version |
| 🇫🇷 FR | 4.41357★ | 162 | 4.41357★ this version |
| 🇬🇧 GB | 4.52574★ | 272 | 4.52574★ this version |
| 🇮🇳 IN | 4.4329★ | 395 | 4.4329★ this version |
| 🇯🇵 JP | 4.32353★ | 170 | 4.32353★ this version |
| 🇺🇸 US | 4.60846★ | 3,213 | 4.60846★ this version |
🔔
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📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for Notes Writer Pro: Notiz & PDF: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
More by Kairoos Solutions SL
View all →📦 Portfolio summaryINDIE studio
5apps·$13K/mocombined
✓ Diversified — top app contributes 39%; risk spread across portfolio
About this analysis
Why medium confidence: 447 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
10 answers · auto-generated from this app's public dataHow much does Notes Writer Pro make per month?▴
Based on our ML-calibrated revenue forecast, Notes Writer Pro earns approximately $5.2K/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 Notes Writer Pro profitable?▴
With estimated build cost $150K and monthly revenue $5.2K, Notes Writer Pro looks break-even-grade — payback period sits around 2.4 years. Profitability also depends on paid-acquisition spend and refund rate which the public model doesn't see.
How many users does Notes Writer Pro have?▴
Estimated audience: ~23K lifetime downloads, ~4K monthly active users, and ~1K 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 Notes Writer Pro?▴
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 Notes Writer Pro built with?▴
Our heuristic places Notes Writer Pro on the Native iOS (Swift / UIKit) 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 Notes Writer Pro still actively maintained?▴
Maintenance status: At risk (40% abandonment risk). Last shipped version was 3 months ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.
How much would Notes Writer Pro sell for?▴
Estimated acquisition value: $100K (marketplace range $75K – $125K). Calculated as 18× monthly revenue using the standard multiple for the detected monetization model + adjustments for age, rating quality and category demand. Calibrated against 2024-2026 Flippa / Acquire.com / MicroAcquire closed-deal medians.
When was Notes Writer Pro last updated?▴
Notes Writer Pro last shipped a new version on 2026-06-17 — 3 months ago. This is the date Apple / Google last accepted a new build, not a content-only push.
Who makes Notes Writer Pro?▴
Notes Writer Pro is published by Kairoos Solutions SL 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 Notes Writer Pro's BU Score?▴
Notes Writer Pro has a BU Score of 66/100 (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.