0
Quality Score
Niche
Heart Rate Zones
✍️ bumetric analysis
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Heart Rate Zones is an Android app from Hayden Campbell in the Health & Fitness category, currently rated — across few ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Quality Score is 0: Niche (micro-niche or pre-traction stage). For a Health & Fitness 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.
💰 Revenue · today and ahead
Today
$119/mo
In 12 months
$60 – $555
In 24 months
$60 – $1664
MICRO 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
💰 Estimated build cost
$175K
Likely range: $130K – $235K
Synthetic estimate derived from category, file size, screen count, monetization layer, and platform reach. Methodology benchmarks: Clutch + GoodFirms 2024-2026 agency surveys. See /methodology.
Breakdown
| MVP baseline (design + 1-store ship) | +$28K |
| 5 unique screens × $4.5K | +$22K |
| Health & Fitness complexity ×1.40 | +$20K |
| Cross-platform reach (iOS + Android) | +$38K |
| 10.8y maintenance × ~1-person team | +$64K |
🔬
How we forecast this revenue
LOW CONFIDENCEBaseline
$119/mo · ML-estimated from 234 triggers
Growth rate
+8.0% MoM · MICRO tier baseline (compound monthly)
Direction
Headwinds: rating drift may slow acquisition
6 months
$76 – $303
12 months
$60 – $555
24 months
$60 – $1.7K
Compound growth at +8.0% MoM (tier baseline for MICRO). Range widens with horizon — typical noise band ±60% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.
📊
BU Investment Matrix
Insufficient data · 35/100MICRO TIERtoo early to scoreRevenue Strength
2.1
Product Quality
0.0
Market Position
0.0
Growth Velocity
5.0
Defensibility
6.0
Operational Safety
10.0
Founder Strength
3.8
Monetization Maturity
1.0
- 💰 Revenue: Marginal — $0 - $500/mo · MICRO tier · indicative confidence, trajectory unclear.
- ⭐ Quality: None★ across 0 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 = $2K-$3K. Portfolio play ($576/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.
🔔
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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.
📈 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 →🔖 vVaries with device📂 Health & Fitness💰 Free📺 Ad-supported🚀 Launched 2015 (10y old)
📝 About this app
Enter your threshold heart rate to calculate your heart rate based training zones:
- Recovery
- Aerobic(All day pace)
- Tempo(2.5 to 8 hours)
- Sub-Threshold(10 to 60 minutes)
- Super-Threshold(3 to 8 minutes)
- Aerobic Capacity(30 seconds to 3 minutes)
- Anaerobic Capacity(5 to 30 seconds)
Features:
- Calculate heart rate training zones based off your threshold heart rate
- 7 Training zones
- Joe Friel training zones
- Free to use
Good for road cycling, triathlon, mountain biking, running and other cardiovascular activities.
How to get your Threshold Heart rate:… View full description on the official store →
- Recovery
- Aerobic(All day pace)
- Tempo(2.5 to 8 hours)
- Sub-Threshold(10 to 60 minutes)
- Super-Threshold(3 to 8 minutes)
- Aerobic Capacity(30 seconds to 3 minutes)
- Anaerobic Capacity(5 to 30 seconds)
Features:
- Calculate heart rate training zones based off your threshold heart rate
- 7 Training zones
- Joe Friel training zones
- Free to use
Good for road cycling, triathlon, mountain biking, running and other cardiovascular activities.
How to get your Threshold Heart rate:… View full description on the official store →
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Heart Rate Zones
- Developer
- Hayden Campbell
- Bundle ID
- com.hcstudios.heartratezonecalculator
- App Store URL
- Open in App Store
- Category
- Health & Fitness
- Content rating
- Not found
- Languages
- Not found
Company
- Website
- hc-studios.web.app
- 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
- $119/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.
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.
More by Hayden Campbell
View all →📦 Portfolio summaryINDIE studio
2apps·$576/mocombined
Lead-app heavy — top app contributes 79%
Full revenue analysis
Read the article-style breakdown for Heart Rate Zones: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.