LunaSolCal
75
Quality Score
Strong
LunaSolCal
Medium confidence
✍️ bumetric analysis
“
LunaSolCal is an iOS app from Volker Voecking Software Engineering in the Utilities category, currently rated 4.9★ across 1,629 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Quality Score is 75: Strong (healthy traction). For a Utilities app, that means healthy traction. 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
$600K
per month
→
12-mo forecast
$635K – $978K
per month
→
24-mo forecast
$759K – $1410K
per month
BIG 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
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Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
🤖Also on Android
$1.1K/mo · 16K ratings · 4.9★
View →
ONE-TIME · BUILD
💰 Estimated build cost
$55K
↳ What it cost to build · not monthly revenue
Likely range $40K – $75K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Pays back in ~2 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 |
| 📦 Asset bundle (79 MB) | +$11K |
| ⚙ Utilities complexity ×0.85 | $-9306 |
Total estimate
$55K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$425K
↳ What it would sell for · not monthly revenue
Marketplace range $325K – $500K · 16× MRR multiple
💸
~7.7× 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 |
| ⭐ ★ rating ≥ 4.7 (premium) | +15% |
| 🏷 Utilities category multiple | -10% |
Final multiple
16× MRR
👥 Estimated audience size
325K
Lifetime downloads (US-equivalent)
Monthly active
65K
Daily active
13K
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
| 📲 Utilities engagement | ~200 installs / rating |
| 🔁 Utilities D30 retention | 20% |
| 📍 DAU / MAU stickiness | 0.20 |
DAU / MAU
20% sticky
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$600K/mo · ML-estimated from 234 triggers
Growth rate
+2.5% MoM · BIG tier baseline (compound monthly)
6 months
$591K – $800K
12 months
$635K – $978K
24 months
$759K – $1.4M
Compound growth at +2.5% MoM (tier baseline for BIG). Range widens with horizon — typical noise band ±15% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.
📊
BU Investment Matrix
Mixed signals · 59/100BIG TIERcompetitive but cautiousGrowth Velocity
5.0
Founder Strength
7.0
Product Quality
8.8
Revenue Strength
5.8
Monetization Maturity
1.0
Defensibility
7.5
Market Position
2.0
Operational Safety
10.0
- 💰 Revenue: Healthy — $240K - $1320K/mo · BIG tier · medium-low confidence, trajectory unclear.
- ⭐ Quality: 4.9★ across 1,629 reviews — strong (top 10%).
- 📍 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 = $10.8M-$19.2M.
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 8 of 8 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 (4.9★)METRIC | +$2,200 | |
| 5 starREVIEW | +$1,800 | |
| excellent appREVIEW | +$1,500 | |
| Low install base (1,629 ratings)METRIC | +$1,500 | |
| Mature app (15y old)METRIC | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| Localized (6 languages)METRIC | +$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.
🆕 What's New · v9.2.3
Fixed an issue calculating the meridian transit data of the moon.
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- LunaSolCal
- Developer
- Volker Voecking Software Engineering
- Bundle ID
- Not found
- App Store URL
- Open in App Store
- Category
- Utilities
- Content rating
- 4+
- Languages
- EN, FR, DE, IT, RU, ES
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
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $27.1K/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 growth1,629 ratings+3094% lifetimeShow 3-year history estimate ▾
Tracked (58 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.
💰Pricing History$0.00 → $4.99 (+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.
📝 About this app
Calculate times of sunrise, sunset, moonrise, moonset and more for your location at any given date.
The following data is calculated:
- Sunrise
- Solar noon
- Sunset
- Day length
- Equation of time
- Declination
- Civil twilight (Dawn/Dusk)
- Nautical twilight (Dawn/Dusk)
- Astronomical twilight (Dawn/Dusk)
- Azimuth at sunrise and sunset
- Altitude during solar noon
- Sun track
- Date and time of Seasons (Spring, Summer, Fall, Winter)
- Solstice and Equinox dates
- Date and time of next solar eclipse
- Moonrise
- Moon transit
- Moonset
- Moon phase
- Distance
- Declination… View full description on the official store →
The following data is calculated:
- Sunrise
- Solar noon
- Sunset
- Day length
- Equation of time
- Declination
- Civil twilight (Dawn/Dusk)
- Nautical twilight (Dawn/Dusk)
- Astronomical twilight (Dawn/Dusk)
- Azimuth at sunrise and sunset
- Altitude during solar noon
- Sun track
- Date and time of Seasons (Spring, Summer, Fall, Winter)
- Solstice and Equinox dates
- Date and time of next solar eclipse
- Moonrise
- Moon transit
- Moonset
- Moon phase
- Distance
- Declination… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 79 MB🔞 4+📱 iOS 12.0+🔖 v9.2.3🔄 updated 0d ago🌐 EN, FR, DE, IT, RU +1📂 Utilities💰 Paid
📅
What Worked™ · Development Pipeline
7 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 $4.99 price point
2026-03
📈
Crossed 500 ratings — social-proof flywheel kicking in
2023-04
📈
Crossed 100 ratings — social-proof flywheel kicking in
2014-10
📈
Crossed 50 ratings — social-proof flywheel kicking in
2012-06
📈
Crossed 10 ratings — social-proof flywheel kicking in
2011-04
⭐
Rating ↑ 4.00 → 4.50 (improved 0.50★)
2011-02
🚀
First tracked snapshot — initial data captured
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇦🇺 AU | 4.78846★ | 52 | 4.78846★ this version |
| 🇧🇷 BR | 5★ | 10 | 5★ this version |
| 🇨🇦 CA | 4.83465★ | 127 | 4.83465★ this version |
| 🇩🇪 DE | 4.8507★ | 1,641 | 4.8507★ this version |
| 🇫🇷 FR | 4.81316★ | 471 | 4.81316★ this version |
| 🇬🇧 GB | 4.81633★ | 147 | 4.81633★ this version |
| 🇮🇳 IN | 4.54545★ | 11 | 4.54545★ this version |
| 🇯🇵 JP | 4.33333★ | 12 | 4.33333★ this version |
| 🇺🇸 US | 4.89442★ | 1,165 | 4.89442★ this version |
🔔
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📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for LunaSolCal: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
More by Volker Voecking Software Engineering
View all →📦 Portfolio summaryINDIE studio
7apps·$29K/mocombined
⚠ Concentrated — top app contributes 92% of combined revenue (single-app dependency)
Similar apps in Utilities
About this analysis
Why medium confidence: 1,629 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
4 answers · auto-generated from this app's public dataHow much does LunaSolCal make per month?▴
Based on our ML-calibrated revenue forecast, LunaSolCal earns approximately $27K/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.
What apps are like LunaSolCal?▴
Browse the full Utilities 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.
Who makes LunaSolCal?▴
LunaSolCal is published by Volker Voecking Software Engineering 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 LunaSolCal's BU Score?▴
LunaSolCal has a BU Score of 75/100 (Strong). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.