QZ Fitness
63
Quality Score
Solid
QZ Fitness
by Roberto Viola
Medium confidence
✍️ Bumetric analysis
“
QZ Fitness is an iOS app from Roberto Viola in the Business category, currently rated 4.8★ across 850 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Quality Score is 63: Solid (established niche player). For a Business 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
$5.0K
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
113 snapshots on record
Rating
4.8
Reviews
850 reviews
Forecast Revenue / mo
$5.0K
Snapshots tracked
113
since Dec 2020
ONE-TIME · BUILD
💰 Estimated build cost
$125K
↳ What it cost to build · not monthly revenue
Likely range $95K – $170K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Pays back in ~2.1y 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 (73 MB) | +$9K |
| ⚙ Business complexity ×1.50 | +$29K |
| ⚙ 5.9y maintenance × ~1-person team | +$35K |
Total estimate
$125K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$100K
↳ What it would sell for · not monthly revenue
Marketplace range $75K – $125K · 21× MRR multiple
💸
~0.8× 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 |
| 📅 5.9y proven track record | +20% |
| ⭐ ★ rating ≥ 4.7 (premium) | +15% |
| 🏷 Business category multiple | +10% |
| ⭐ Small user base (<1K ratings) | -8% |
Final multiple
21× MRR
👥 Estimated audience size
38K
Lifetime downloads (US-equivalent)
Monthly active
6.4K
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
| 📲 Business engagement | ~65 installs / rating |
| 📅 5.9y of rating accumulation | -30% |
| 🔁 Business D30 retention | 22% |
| 📍 DAU / MAU stickiness | 0.30 |
DAU / MAU
30% sticky
🛠 Estimated tech stack
🍎
Native iOS (SwiftUI)
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 | 73 MB |
| 🏷 Category context | Business |
| 📦 Small-mid iOS bundle | → Native SwiftUI (post-2020 era) |
💀 Maintenance status
Active
15%
Last shipped 2026-09-02 · 73 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
| 📅 73 days since last update | Healthy release cadence |
Verdict
Active
🔬
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)
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
Below median · 45/100MID TIERunderperforming peersGrowth Velocity
5.0
Founder Strength
3.7
Product Quality
6.7
Revenue Strength
3.7
Monetization Maturity
1.0
Defensibility
3.5
Market Position
2.0
Operational Safety
10.0
- 💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.82★ across 850 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 = $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 13 of 13 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Paid app ($6.99)METRIC | +$2,800 | |
| subscriptionREVIEW | +$2,500 | |
| Excellent rating (4.8★)METRIC | +$2,200 | |
| worth every pennyREVIEW | +$2,000 | |
| bugsREVIEW | −$1,800 | |
| 5 starREVIEW | +$1,800 | |
| excellent appREVIEW | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| slowREVIEW | −$1,200 | |
| too expensiveREVIEW | −$1,000 | |
| priceyREVIEW | −$800 | |
| Established app (5y old)METRIC | +$800 | |
| Early-stage install base (850 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 · v2.21
New Equipment Support
Added support for 50+ new devices and protocols, including: Ultrasport F-Bike Pro, Kingsmith X21, Xplova Noza One, Keep Bike, Echelon Row 7s, Magee T600 ECO Smart Trainer, SmartRow V3, LifeSmart TM55, Volava, CARE SportsPlus rower, TOPUTURE TP6 and TEB,… Full release notes →
Added support for 50+ new devices and protocols, including: Ultrasport F-Bike Pro, Kingsmith X21, Xplova Noza One, Keep Bike, Echelon Row 7s, Magee T600 ECO Smart Trainer, SmartRow V3, LifeSmart TM55, Volava, CARE SportsPlus rower, TOPUTURE TP6 and TEB,… Full release notes →
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- QZ Fitness
- Developer
- Roberto Viola
- Bundle ID
- org.cagnulein.qdomyoszwift
- App Store URL
- Open in App Store
- Category
- Business
- Content rating
- 4+
- Languages
- Not found
Company
- Website
- robertoviola.cloud
- Tagline
- Roberto Viola
- Description
- QZ developer, Bluetooth tinkerer, blogger, commuter, and fitness-tech explorer.
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- Not found
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
- 🇮🇳#36 /100
- 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 growth847 ratings+153% 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 Distribution1 of 9 markets
🇮🇳
IN
Top-grossing rank: #36 / 100
Other markets
Outside top 100
in US, GB, DE, FR, JP, CA, AU, BR, IN
in US, GB, DE, FR, JP, CA, AU, BR, IN
This app currently ranks in only one of the 9 markets we monitor. Niche or regional apps often launch this way before global rollout. Rankings update daily.
📊Category Rank Trajectory#36 now · best #36 · worst #54
Lower line = better rank · Estimate from ratings growth model · Lower position on chart = worse rank · Higher = top of chart
💰Pricing History$0.00 → $6.99 (+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
This application is developed independently. It is not affiliated with, endorsed by, or sponsored by Decathlon or Domyos.
QZ is not affiliated with or endorsed by any subscription service or maker of exercise equipment.
Have you got a bike (echelon, flywheel, proform, i-console yesoul, decathlon, domyos, keiser, ...) or a Domyos (Decathlon) / Horizon / Proform treadmill and you want to join to zwift? This app allows you to give a second life to your machine!
Also ellipticals and rowers machinery are supported now!… View full description on the official store →
QZ is not affiliated with or endorsed by any subscription service or maker of exercise equipment.
Have you got a bike (echelon, flywheel, proform, i-console yesoul, decathlon, domyos, keiser, ...) or a Domyos (Decathlon) / Horizon / Proform treadmill and you want to join to zwift? This app allows you to give a second life to your machine!
Also ellipticals and rowers machinery are supported now!… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 73 MB🔞 4+📱 iOS 12.0+🔖 v2.21🔄 updated 2mo ago📂 Business💰 Paid🚀 Launched 2020 (5y old)
📅
What Worked™ · Development Pipeline
12 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 →
2026-09
🔧
Shipped update — v2.20 → v2.21
→ 30 days after: reviews +8 high confidence
2026-05
📈
Crossed 10 ratings — social-proof flywheel kicking in
→ 30 days after: reviews +10 medium · co-occurring
2026-05
💲
Went paid — introduced $6.99 price point
→ 30 days after: reviews +10 medium · co-occurring
2026-03
🔧
Shipped update — v? → v2.20
→ 30 days after: revenue +$223/mo · reviews −386 high confidence
2021-08
📈
Crossed 100 ratings — social-proof flywheel kicking in
2021-08
📈
Crossed 100 ratings — social-proof flywheel kicking in
→ 30 days after: reviews +5 medium · co-occurring
2021-02
📈
Crossed 50 ratings — social-proof flywheel kicking in
→ 30 days after: reviews +13 medium · co-occurring
2021-02
📈
Crossed 50 ratings — social-proof flywheel kicking in
→ 30 days after: reviews +56 medium · co-occurring
2021-01
📈
Crossed 10 ratings — social-proof flywheel kicking in
→ 30 days after: reviews +43 medium · co-occurring
2021-01
📈
Crossed 10 ratings — social-proof flywheel kicking in
→ 30 days after: reviews +53 low · multiple changes
2020-12
🚀
First tracked snapshot — initial data captured
→ 30 days after: reviews +10 medium · co-occurring
2020-12
🚀
First tracked snapshot — initial data captured
→ 30 days after: reviews +10 medium · co-occurring
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇦🇺 AU | 4.65789★ | 38 | 4.65789★ this version |
| 🇧🇷 BR | 5★ | 3 | 5★ this version |
| 🇨🇦 CA | 4.75417★ | 240 | 4.75417★ this version |
| 🇩🇪 DE | 4.8★ | 105 | 4.8★ this version |
| 🇫🇷 FR | 4.7755★ | 49 | 4.7755★ this version |
| 🇬🇧 GB | 4.91111★ | 180 | 4.91111★ this version |
| 🇮🇳 IN | 5★ | 3 | 5★ this version |
| 🇯🇵 JP | 0★ | 0 | — |
| 🇺🇸 US | 4.82235★ | 850 | 4.82235★ this version |
🔔
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📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for QZ Fitness: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
About this analysis
Why medium confidence: 850 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
10 answers · auto-generated from this app's public dataHow much does QZ Fitness make per month?▴
Based on our ML-calibrated revenue forecast, QZ Fitness earns approximately $5.0K/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 QZ Fitness profitable?▴
With estimated build cost $125K and monthly revenue $5.0K, QZ Fitness looks break-even-grade — payback period sits around 2.1 years. Profitability also depends on paid-acquisition spend and refund rate which the public model doesn't see.
How many users does QZ Fitness have?▴
Estimated audience: ~38K lifetime downloads, ~6K 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 QZ Fitness?▴
Browse the full Business 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 QZ Fitness built with?▴
Our heuristic places QZ Fitness on the Native iOS (SwiftUI) 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 QZ Fitness still actively maintained?▴
Maintenance status: Active (15% abandonment risk). Last shipped version was 2 months ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.
How much would QZ Fitness sell for?▴
Estimated acquisition value: $100K (marketplace range $75K – $125K). Calculated as 21× 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 QZ Fitness last updated?▴
QZ Fitness last shipped a new version on 2026-09-02 — 2 months ago. This is the date Apple / Google last accepted a new build, not a content-only push.
Who makes QZ Fitness?▴
QZ Fitness is published by Roberto Viola 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 QZ Fitness's BU Score?▴
QZ Fitness has a BU Score of 63/100 (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.