64
Quality Score
Solid
KnowledgeBase Builder
Low confidence
✍️ bumetric analysis
“
KnowledgeBase Builder is an iOS app from Ingo Straub in the Productivity category, currently rated 4.7★ across 22 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Quality Score is 64: 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
$1.7K
per month
→
12-mo forecast
$1.5K – $5.4K
per month
→
24-mo forecast
$1.4K – $12.5K
per month
INDIE 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
Loading…
Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
ONE-TIME · BUILD💰 Estimated build cost
$100K
↳ What it cost to build · not monthly revenue
Likely range $75K – $135K
$25K · MVP floor$100K · indie scale$500K+ · studio build
📈Pays back in ~10 months 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 |
| ⚙Productivity complexity ×1.10 | +$5K |
| ⚙7.4y maintenance × ~1-person team | +$44K |
Total estimate$100K
ONE-TIME · EXIT VALUE💵 Estimated acquisition value
$200K
↳ What it would sell for · not monthly revenue
Marketplace range $150K – $250K · 19× MRR multiple
💸~2.0× return on build cost
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 |
| 📅7.4y proven track record | +20% |
| ⭐★ rating ≥ 4.4 (solid) | +8% |
| 🏷Productivity category multiple | +8% |
| ⭐Small user base (<1K ratings) | -8% |
Final multiple19× MRR
🛠 Estimated tech stack
🍎
Native iOS (Swift / UIKit)
High confidence · 80%
Also possible
Native iOS (SwiftUI)
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 | 28 MB |
| 🏷Category context | Productivity |
| 📦Compact iOS bundle | → Native Swift / UIKit (pre-2020 era) |
💀 Maintenance status
Active
15%
Last shipped 2026-05-01 · 24 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
| 📅24 days since last update | Active development |
| 👥Small user base (22 ratings) + 7.4y old | +10% (solo-project pattern) |
VerdictActive
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$1.7K/mo · ML-estimated from 234 triggers
Growth rate
+6.0% MoM · INDIE tier baseline (compound monthly)
Direction
Headwinds: rating drift may slow acquisition
6 months
$1.5K – $3.4K
12 months
$1.5K – $5.4K
24 months
$1.4K – $12.5K
Compound growth at +6.0% MoM (tier baseline for INDIE). Range widens with horizon — typical noise band ±40% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.
📊
BU Investment Matrix
Early-stage solo · 42/100INDIE TIERexpected for tierRevenue Strength
3.2
Product Quality
3.7
Market Position
2.0
Growth Velocity
5.0
Defensibility
3.9
Operational Safety
10.0
Founder Strength
5.0
Monetization Maturity
1.0
- 💰 Revenue: Modest — $686 - $4290/mo · INDIE tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.68★ across 22 reviews — weak — significant quality concerns.
- 📍 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 = $30K-$54K. Portfolio play ($10K/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 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 | |
| Excellent rating (4.7★)METRIC | +$2,200 | |
| 5 starREVIEW | +$1,800 | |
| Established app (7y old)METRIC | +$800 | |
| Pre-traction phase (22 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.
App Specs
🔐 Own this app? Claim & verify MRR →💾 28 MB🔞 4+📱 iOS 11.4+🔖 v7.13.3🔄 updated 3w ago🌐 EN, DE, ES📂 Productivity💰 Paid🚀 Launched 2019 (7y old)
📝 About this app
The InfoRapid KnowledgeBase Builder is an excellent tool for Knowledge Management. You can save text documents and web pages with all formattings and links in your knowledge base and perform a full text search in it. Since every document is attached as a text note to a mindmap item, you can organize them perfectly in a large mindmap. This mindmap is browsable, so you will never lose perspective even with thousands of documents. All items are stored in a reliable local SQLite database.… View full description on the official store →
🆕 What's New · v7.13.3
New: Give your diagrams a personal touch with a selection of high-quality new background patterns. New: You can now use the image assigned to the currently selected root item as the background image. These options can be found under: Format Diagram > Diagram > Background Image.… Full release notes →
📅
What Worked™ · Development Pipeline
5 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
💲
Went paid — introduced $8.99 price point
2026-03
⭐
Rating ↓ 4.71 → 4.40 (dropped 0.31★)
2026-03
📈
Crossed 10 ratings — social-proof flywheel kicking in
2020-06
⭐
Rating ↓ 5.00 → 4.50 (dropped 0.50★)
2019-08
🚀
First tracked snapshot — initial data captured
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇺🇸 US | 4.68182★ | 22 | 4.68182★ this version |
| 🇬🇧 GB | 3.66667★ | 3 | 3.66667★ this version |
| 🇩🇪 DE | 4.38462★ | 13 | 4.38462★ this version |
| 🇫🇷 FR | 5★ | 3 | 5★ this version |
| 🇯🇵 JP | 4★ | 1 | 4★ this version |
| 🇨🇦 CA | 4.83333★ | 6 | 4.83333★ this version |
| 🇦🇺 AU | 5★ | 2 | 5★ this version |
| 🇧🇷 BR | 4.75★ | 4 | 4.75★ this version |
| 🇮🇳 IN | 4★ | 2 | 4★ this version |
🔔
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Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- KnowledgeBase Builder
- Developer
- Ingo Straub
- Bundle ID
- de.inforapid.knowledgebasebuilder.mobile
- App Store URL
- Open in App Store
- Category
- Productivity
- Content rating
- 4+
- Languages
- EN, DE, ES
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
- $10.4K/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.
⭐Recent App Store Reviews6 latest · avg 4.67★ · 66.7% 5★ · 0% 1★
5★4 (67%)
4★2 (33%)
3★0 (0%)
2★0 (0%)
1★0 (0%)
+1 ratings/week
Praise: great ×2 excellent ×1 favorite ×1 perfect ×1
Top positive
★★★★★ Thank You
When I first bought the Info-rapid KnowledgeBase Builder, I left a very unfavorable review. Mea Culpa, with a small investment in time, this program is adaptable to a data query, sort, manipulation, relational analysis……. Thank You Mr. Str…
★★★★★ Great app for graph visualization !
This app has many ways to help visualize complex graphs, including assigning categories to items and relations and filtering the graph by category or assigning color by category. You can also limit how many items are visible at a time ei…
📈Ratings growth22 ratings+2100% lifetimeShow 3-year history estimate ▾
Tracked (9 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.
💰Pricing History$0.00 → $8.99 (+0%)
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
About this analysis
Why low confidence: only 22 ratings · no founder-verified revenue (model estimate only) · revenue figure is directional only.
📌 Final verdict — read this before you trust the numbers above
KnowledgeBase Builder is a small / niche iOS app in the productivity space with weak public traction — only 22 ratings, no founder-verified MRR, and not ranked in any monitored grossing chart. The app appears to be monetised, but public signals are too sparse for a precise revenue estimate.
Bottom line: treat all revenue, audience and acquisition-value numbers on this page as directional only — not founder-verified facts.
❓ Frequently Asked Questions
7 answers · auto-generated from this app's public dataHow much does KnowledgeBase Builder make per month?▴
Our model estimates KnowledgeBase Builder earns roughly $10K/mo, but with only 22 ratings the confidence interval is wide. No founder-verified MRR is available for this app, so this is a model output calibrated against comparable apps in the same category. See methodology for the formula.
What apps are like KnowledgeBase Builder?▴
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 KnowledgeBase Builder built with?▴
Our heuristic places KnowledgeBase Builder on the Native iOS (Swift / UIKit) stack (High confidence, 80%). Signals: app bundle size, category context, store-description markers, release-date era. We don't disassemble binaries. Alternative possibilities: Native iOS (SwiftUI).
Is KnowledgeBase Builder still actively maintained?▴
Maintenance status: Active (15% abandonment risk). Last shipped version was 24 days ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.
When was KnowledgeBase Builder last updated?▴
KnowledgeBase Builder last shipped a new version on 2026-05-01 — less than a month ago. This is the date Apple / Google last accepted a new build, not a content-only push.
Who makes KnowledgeBase Builder?▴
KnowledgeBase Builder is published by Ingo Straub 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 KnowledgeBase Builder's BU Score?▴
KnowledgeBase Builder has a BU Score of 64/100 (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.