Function Health
81
Quality Score
Excellent
Function Health
by Function Health
High confidence
✍️ Bumetric analysis
“
Function Health is an iOS app from Function Health in the Health & Fitness category, currently rated 4.9★ across 20,240 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Quality Score is 81: Excellent (strong product-market fit). For a Health & Fitness app, that means strong product-market fit. 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
$1.3K
per month
→
12-mo forecast
$1.1K – $4.0K
per month
→
24-mo forecast
$1.0K – $9.3K
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
138 snapshots on record
Rating
4.9
Reviews
20,240 reviews
Forecast Revenue / mo
$1.3K
Snapshots tracked
138
since Sep 2024
ONE-TIME · BUILD
💰 Estimated build cost
$140K
↳ What it cost to build · not monthly revenue
Likely range $105K – $190K
$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 |
| 📦 Asset bundle (195 MB) | +$40K |
| ⚙ Health & Fitness complexity ×1.40 | +$36K |
| ⚙ 2.1y maintenance × ~1-person team | +$12K |
Total estimate
$140K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$25K
↳ What it would sell for · not monthly revenue
Marketplace range $20K – $35K · 21× MRR multiple
💸
~0.2× 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 |
| 📅 2.1y proven track record | +10% |
| ⭐ ★ rating ≥ 4.7 (premium) | +15% |
| 🏷 Health & Fitness category multiple | +10% |
Final multiple
21× MRR
👥 Estimated audience size
1.2M
Lifetime downloads (US-equivalent)
Monthly active
270K
Daily active
94K
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
| 📲 Health & Fitness engagement | ~70 installs / rating |
| 📅 2.1y of rating accumulation | -10% |
| 🔁 Health & Fitness D30 retention | 22% |
| 📍 DAU / MAU stickiness | 0.35 |
DAU / MAU
35% sticky
🛠 Estimated tech stack
🍎
Native iOS (SwiftUI)
Medium confidence · 60%
Also possible
React Native
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 | 195 MB |
| 🏷 Category context | Health & Fitness |
| 📦 Mid-large iOS bundle | → Likely native SwiftUI (post-2020 era) |
💀 Maintenance status
Active
5%
Last shipped 2026-09-08 · 16 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
| 📅 16 days since last update | Active development |
Verdict
Active
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$1.3K/mo · ML-estimated from 234 triggers
Growth rate
+6.0% MoM · INDIE tier baseline (compound monthly)
Direction
Headwinds: low defensibility moat
6 months
$1.1K – $2.5K
12 months
$1.1K – $4.0K
24 months
$1.0K – $9.3K
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
Early-stage solo · 46/100INDIE TIERexpected for tierGrowth Velocity
5.0
Founder Strength
5.3
Product Quality
9.9
Revenue Strength
3.1
Monetization Maturity
1.0
Defensibility
2.5
Market Position
0.3
Operational Safety
10.0
- 💰 Revenue: Modest — $511 - $3196/mo · INDIE tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.93★ across 20,240 reviews — exceptional (top 1% in category).
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: dev shipping weekly.
- ⚠️ 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 = $23K-$40K. Portfolio play ($17K/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.
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:
| Mid install base (20,240 ratings)METRIC | +$5,500 | |
| Excellent rating (4.9★)METRIC | +$2,200 | |
| bugsREVIEW | −$1,800 | |
| 5 starREVIEW | +$1,800 | |
| securityREVIEW | +$1,800 | |
| great valueREVIEW | +$1,600 | |
| cancelledREVIEW | −$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| annoying adsREVIEW | −$1,100 | |
| support teamREVIEW | +$900 | |
| Ad-supported / freemiumMETRIC | +$600 | |
| Single-language (English only)METRIC | −$400 | |
| Growing app (2y old)METRIC | +$200 |
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 · v1.42.0
This update includes:
- UX improvements and bug fixes
- UX improvements and bug fixes
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Function Health
- Developer
- Function Health
- Bundle ID
- com.functionhealth.functionhealth
- App Store URL
- Open in App Store
- Category
- Health & Fitness
- Content rating
- 17+
- Languages
- EN
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
- $1.3K/mo
- Top-grossing rank
- Outside top 100 in US Health & Fitness
- 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 growth24,484 ratings+14474% 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 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.
🚀Update Frequency · Releases per Quarter4 releases tracked
🚀Version Release Timeline4 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
Function membership helps you take control of your health with 160+ lab tests each year, personalized Protocols, and Private AI Chat—all backed by advanced science and your real data.
Built with top doctors, Function gives you the power to understand your body, track how it evolves, and make meaningful change.
NOW AVAILABLE: HOME OR OFFICE BLOOD DRAWS
Schedule a concierge blood draw at your home or office. A licensed specialist comes to you and completes your blood draw in under 20 minutes. Available in select locations.
160+ LAB TESTS… View full description on the official store →
Built with top doctors, Function gives you the power to understand your body, track how it evolves, and make meaningful change.
NOW AVAILABLE: HOME OR OFFICE BLOOD DRAWS
Schedule a concierge blood draw at your home or office. A licensed specialist comes to you and completes your blood draw in under 20 minutes. Available in select locations.
160+ LAB TESTS… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 195 MB🔞 17+📱 iOS 16.4+🔖 v1.42.0🔄 updated 2w ago🌐 EN📂 Health & Fitness💰 Paid🚀 Launched 2024 (2y old)
📅
What Worked™ · Development Pipeline
17 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 — v1.37 → v1.42.0
→ 30 days after: reviews +632 medium · co-occurring
2026-08
🔧
Shipped update — v1.32.0 → v1.37
→ 30 days after: reviews +1,413 medium · co-occurring
2026-06
🔧
Shipped update — v1.26.0 → v1.32.0
→ 30 days after: reviews +2,831 medium · co-occurring
2026-05
🔧
Shipped update — v? → v1.26.0
→ 30 days after: reviews +4,561 medium · co-occurring
2026-04
⭐
Rating ↑ 3.82 → 4.94 (improved 1.12★)
→ 30 days after: reviews +1,730 high confidence
2026-04
📈
Crossed 500 ratings — social-proof flywheel kicking in
→ 30 days after: reviews +1,730 high confidence
2025-07
📈
Crossed 100 ratings — social-proof flywheel kicking in
→ 30 days after: reviews +18 high confidence
2025-05
⭐
Rating ↓ 4.06 → 3.73 (dropped 0.33★)
→ 30 days after: reviews +10 high confidence
2025-02
📈
Crossed 50 ratings — social-proof flywheel kicking in
→ 30 days after: rating −0.18★ · reviews +10 high confidence
2024-12
⭐
Rating ↑ 3.67 → 4.43 (improved 0.76★)
→ 30 days after: rating +0.08★ · reviews +20 high confidence
2024-12
📈
Crossed 10 ratings — social-proof flywheel kicking in
→ 30 days after: rating +0.08★ · reviews +20 high confidence
2024-12
📈
Crossed 10 ratings — social-proof flywheel kicking in
→ 30 days after: rating +0.84★ · reviews +40 medium · co-occurring
2024-12
⭐
Rating ↓ 3.40 → 3.00 (dropped 0.40★)
→ 30 days after: rating +0.76★ · reviews +20 medium · co-occurring
2024-12
⭐
Rating ↓ 4.00 → 3.40 (dropped 0.60★)
→ 30 days after: rating +0.76★ · reviews +20 medium · co-occurring
2024-12
⭐
Rating ↑ 3.67 → 4.00 (improved 0.33★)
→ 30 days after: rating +0.76★ · reviews +20 medium · co-occurring
2024-11
⭐
Rating ↓ 5.00 → 3.67 (dropped 1.33★)
→ 30 days after: rating +0.76★ · reviews +20 medium · co-occurring
2024-09
🚀
First tracked snapshot — initial data captured
🔔
Track this app’s revenue
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📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for Function Health: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
About this analysis
Why high confidence: 20,240 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
10 answers · auto-generated from this app's public dataHow much does Function Health make per month?▴
Based on our ML-calibrated revenue forecast, Function Health earns approximately $1.3K/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 Function Health profitable?▴
With estimated build cost $140K and monthly revenue $1.3K, Function Health looks well below break-even — current monthly revenue is much smaller than the estimated build cost. Profitability also depends on paid-acquisition spend and refund rate which the public model doesn't see.
How many users does Function Health have?▴
Estimated audience: ~1.2M lifetime downloads, ~270K monthly active users, and ~94K 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 Function Health?▴
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.
What is Function Health built with?▴
Our heuristic places Function Health on the Native iOS (SwiftUI) stack (Medium confidence, 60%). Signals: app bundle size, category context, store-description markers, release-date era. We don't disassemble binaries. Alternative possibilities: React Native, Flutter.
Is Function Health still actively maintained?▴
Maintenance status: Active (5% abandonment risk). Last shipped version was 16 days ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.
How much would Function Health sell for?▴
Estimated acquisition value: $25K (marketplace range $20K – $35K). 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 Function Health last updated?▴
Function Health last shipped a new version on 2026-09-08 — less than a month ago. This is the date Apple / Google last accepted a new build, not a content-only push.
Who makes Function Health?▴
Function Health is published by Function Health 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 Function Health's BU Score?▴
Function Health has a BU Score of 81/100 (Excellent). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.