KOSTAL Solar App
24
Quality Score
Niche
✍️ Bumetric analysis
“
KOSTAL Solar App is an iOS app from KOSTAL Solar Electric GmbH in the Utilities category, currently rated 2.0★ across 6 ratings. Initial signal reads as mostly critical sentiment so far: users flag rough edges and unmet expectations.
Quality Score is 24: Niche (micro-niche or pre-traction stage). For a Utilities app, that means micro-niche or pre-traction stage. 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 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
9 snapshots on record
Rating
2.0
Reviews
6 reviews
Forecast Revenue / mo
$5.0K
Snapshots tracked
9
since Sep 2019
🤖Also on Android
—/mo · 3K ratings · 2.9★
View →
ONE-TIME · BUILD
💰 Estimated build cost
$95K
↳ What it cost to build · not monthly revenue
Likely range $70K – $130K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Pays back in ~1.6y 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 (68 MB) | +$7K |
| ⚙ Utilities complexity ×0.85 | $-8626 |
| ⚙ 7.6y maintenance × ~1-person team | +$45K |
Total estimate
$95K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$50K
↳ What it would sell for · not monthly revenue
Marketplace range $45K – $75K · 12× MRR multiple
💸
~0.5× 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 |
| 📅 7.6y proven track record | +20% |
| ⭐ ★ rating < 3.5 (weak) | -18% |
| 🏷 Utilities category multiple | -10% |
| ⭐ Small user base (<1K ratings) | -8% |
Final multiple
12× MRR
🛠 Estimated tech stack
🍎
Native iOS (Swift / UIKit)
Medium confidence · 70%
Also possible
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 | 68 MB |
| 🏷 Category context | Utilities |
| 📦 Small-mid iOS bundle | → Native Swift / UIKit (pre-2020 era) |
💀 Maintenance status
Likely abandoned
82%
Last shipped 2025-09-25 · 410 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
| 📅 1y 1mo since last update | Likely deprioritized |
| 👥 Small user base (6 ratings) + 7.6y old | +10% (solo-project pattern) |
Verdict
Likely abandoned
🔬
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
Headwinds: rating drift may slow acquisition
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
Stalled · 34/100MID TIERno growth momentumGrowth Velocity
5.0
Founder Strength
3.7
Product Quality
1.6
Revenue Strength
3.7
Monetization Maturity
1.0
Defensibility
5.4
Market Position
2.0
Operational Safety
5.0
- 💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 2.0★ across 6 reviews — weak — significant quality concerns.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: ⚠ last update 407d ago — possibly dormant.
- ⚠️ Risk: Elevated — dormant (407d since update).
🎯 For competitors: Vulnerable. Quality drift + slow updates create a clear opening for a fresh competitor with active dev cadence.
💵 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 6 of 6 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| bugsREVIEW | −$1,800 | |
| Below-average rating (2.0★)METRIC | −$1,500 | |
| Established app (7y old)METRIC | +$800 | |
| Ad-supported / freemiumMETRIC | +$600 | |
| Localized (9 languages)METRIC | +$600 | |
| Pre-traction phase (6 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.
🆕 What's New · v1.2.59
- Fixed data display issue with zero points
- Various minor improvements and bug fixes
- Various minor improvements and bug fixes
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- KOSTAL Solar App
- Developer
- KOSTAL Solar Electric GmbH
- Bundle ID
- com.kostal.solarapp.ios
- App Store URL
- Open in App Store
- Category
- Utilities
- Content rating
- 4+
- Languages
- NL, EN, FR, DE, EL, IT, PL, ES, SV
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
- $5.0K/mo
- Top-grossing rank
- Outside top 100 in US Utilities
- 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 growth6 ratings+500% lifetimeShow 3-year history estimate ▾
Tracked (9 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.
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
Professional monitoring for your photovoltaic system.
Important:
The KOSTAL Solar App now obtains data from the new KOSTAL Solar portal. Data and information from the PIKO Solar Portal are no longer displayed in the app.
To enable you to use the KOSTAL Solar App with your existing solar portal account, KOSTAL will send you a welcome e-mail in the the next few days, asking you to re-enter your password. If you do not want to wait for the welcome e-mail, you can use the "Reset password" function on the KOSTAL Solar Portal website for your existing account.
KOSTAL Solar App… View full description on the official store →
Important:
The KOSTAL Solar App now obtains data from the new KOSTAL Solar portal. Data and information from the PIKO Solar Portal are no longer displayed in the app.
To enable you to use the KOSTAL Solar App with your existing solar portal account, KOSTAL will send you a welcome e-mail in the the next few days, asking you to re-enter your password. If you do not want to wait for the welcome e-mail, you can use the "Reset password" function on the KOSTAL Solar Portal website for your existing account.
KOSTAL Solar App… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 68 MB🔞 4+📱 iOS 14.5+🔖 v1.2.59🔄 updated 1y ago🌐 NL, EN, FR, DE, EL +4📂 Utilities💰 Free🚀 Launched 2019 (7y old)
📅
What Worked™ · Development Pipeline
6 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
🔄
Monetization changed: freemium → free
2026-05
⭐
Rating ↑ 1.70 → 2.00 (improved 0.30★)
2026-03
📈
Crossed 10 ratings — social-proof flywheel kicking in
2026-03
⭐
Rating ↓ 2.00 → 1.70 (dropped 0.30★)
2025-10
⭐
Rating ↓ 3.00 → 2.00 (dropped 1.00★)
2019-09
🚀
First tracked snapshot — initial data captured
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇦🇺 AU | 0★ | 0 | — |
| 🇧🇷 BR | 0★ | 0 | — |
| 🇨🇦 CA | 0★ | 0 | — |
| 🇩🇪 DE | 1.69281★ | 2,155 | 1.69281★ this version |
| 🇫🇷 FR | 1.16667★ | 6 | 1.16667★ this version |
| 🇬🇧 GB | 2.33333★ | 3 | 2.33333★ this version |
| 🇮🇳 IN | 0★ | 0 | — |
| 🇯🇵 JP | 0★ | 0 | — |
| 🇺🇸 US | 2★ | 6 | 2★ this version |
🔔
Track this app’s revenue
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📝 Description
95
BU Score · Transcendent
More by KOSTAL Solar Electric GmbH
View all →📦 Portfolio summaryINDIE studio
3apps·$10K/mocombined
Lead-app heavy — top app contributes 50%
About this analysis
Why low confidence: only 6 ratings · no founder-verified revenue (model estimate only) · revenue figure is directional only.
📌 Final verdict — read this before you trust the numbers above
KOSTAL Solar App is a early-stage iOS app in the utilities space with weak public traction — only 6 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 KOSTAL Solar App make per month?▴
Low-confidence model estimate. KOSTAL Solar App has only 6 App Store ratings, so our revenue model has very little signal to work with — treat the ~$5.0K/mo figure as directional only, not a verified MRR. No founder-verified revenue data is available for this app. See methodology for the formula and confidence bands.
What apps are like KOSTAL Solar App?▴
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.
What is KOSTAL Solar App built with?▴
Our heuristic places KOSTAL Solar App on the Native iOS (Swift / UIKit) stack (Medium confidence, 70%). Signals: app bundle size, category context, store-description markers, release-date era. We don't disassemble binaries. Alternative possibilities: Flutter.
Is KOSTAL Solar App still actively maintained?▴
Maintenance status: Likely abandoned (82% abandonment risk). Last shipped version was 1+ years ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.
When was KOSTAL Solar App last updated?▴
KOSTAL Solar App last shipped a new version on 2025-09-25 — more than 1 year(s) ago. This is the date Apple / Google last accepted a new build, not a content-only push.
Who makes KOSTAL Solar App?▴
KOSTAL Solar App is published by KOSTAL Solar Electric GmbH 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 KOSTAL Solar App's BU Score?▴
KOSTAL Solar App has a BU Score of 24/100 (Niche). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.