Rumpfzirkel
52
Quality Score
Solid
Rumpfzirkel
Low confidence
✍️ bumetric analysis
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Rumpfzirkel is an iOS app from Sarah Buck in the Health & Fitness category, currently rated 5.0★ across 2 ratings. Initial signal reads as no scraped reviews yet: judgment based on metadata only.
Quality Score is 52: Solid (established niche player). For a Health & Fitness 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
$995
per month
→
12-mo forecast
$870 – $3138
per month
→
24-mo forecast
$806 – $7258
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
🤖Also on Android
$2.2K/mo · 35 ratings · 4.0★
View →
ONE-TIME · BUILD
💰 Estimated build cost
$70K
↳ What it cost to build · not monthly revenue
Likely range $50K – $95K
$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 |
| ⚙ Health & Fitness complexity ×1.40 | +$20K |
Total estimate
$70K
🔬
How we forecast this revenue
LOW CONFIDENCEBaseline
$995/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
$848 – $2.0K
12 months
$870 – $3.1K
24 months
$806 – $7.3K
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
Pre-traction · 37/100INDIE TIERlimited signalRevenue Strength
3.0
Product Quality
4.0
Market Position
2.0
Growth Velocity
5.0
Defensibility
4.5
Operational Safety
7.0
Founder Strength
2.9
Monetization Maturity
1.0
- 💰 Revenue: Marginal — $398 - $2489/mo · INDIE tier · medium confidence, trajectory unclear.
- ⭐ Quality: 5.0★ across 2 reviews — weak — significant quality concerns.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: ⚠ last update 560d ago — possibly dormant.
- ⚠️ Risk: Moderate — dormant (560d since update).
🎯 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 = $17K-$31K.
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 4 of 4 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 (5.0★)METRIC | +$2,200 | |
| Mature app (13y old)METRIC | +$1,500 | |
| Pre-traction phase (2 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 · v1.11
Bug fixes and improvements
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Rumpfzirkel
- Developer
- Sarah Buck
- Bundle ID
- Not found
- App Store URL
- Open in App Store
- Category
- Health & Fitness
- Content rating
- 4+
- Languages
- EN, DE
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
- $86/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 growth2 ratings+100% lifetimeShow 3-year history estimate ▾
Tracked (2 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 → $2.99 (+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
Welcome to "Rumpfzirkel" - a core strength training program that was developed in Switzerland by two physical therapists. Rumpfzirkel in English means “core circuit“. It’s a highly effective and efficient exercise program fully-customizable to your level of fitness.
A strong and stable core is the basis of healthy posture. In addition, core strength benefits all your daily physical activities. In each lap of this self-paced circuit you will fully and systematically work each muscle group within and surrounding your core. The only equipment needed is a workout mat.… View full description on the official store →
A strong and stable core is the basis of healthy posture. In addition, core strength benefits all your daily physical activities. In each lap of this self-paced circuit you will fully and systematically work each muscle group within and surrounding your core. The only equipment needed is a workout mat.… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 45 MB🔞 4+📱 iOS 13.0+🔖 v1.11🔄 updated 0d ago🌐 EN, DE📂 Health & Fitness💰 Paid
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇺🇸 US | 5★ | 4 | 5★ this version |
| 🇬🇧 GB | 5★ | 1 | 5★ this version |
| 🇩🇪 DE | 5★ | 2 | 5★ this version |
| 🇫🇷 FR | 4★ | 1 | 4★ this version |
| 🇯🇵 JP | 0★ | 0 | — |
| 🇨🇦 CA | 0★ | 0 | — |
| 🇦🇺 AU | 0★ | 0 | — |
| 🇧🇷 BR | 0★ | 0 | — |
| 🇮🇳 IN | 0★ | 0 | — |
🔔
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📝 Description
95
BU Score · Transcendent
About this analysis
Why low confidence: only 2 ratings · no founder-verified revenue (model estimate only) · revenue figure is directional only.
📌 Final verdict — read this before you trust the numbers above
Rumpfzirkel is a very early-stage iOS app in the health & fitness space with weak public traction — only 2 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
4 answers · auto-generated from this app's public dataHow much does Rumpfzirkel make per month?▴
Low-confidence model estimate. Rumpfzirkel has only 2 App Store ratings, so our revenue model has very little signal to work with — treat the ~$86/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 Rumpfzirkel?▴
Browse the full Health & Fitness 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 Rumpfzirkel?▴
Rumpfzirkel is published by Sarah Buck 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 Rumpfzirkel's BU Score?▴
Rumpfzirkel has a BU Score of 52/100 (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.