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81
BU Score
Excellent

Function Health

4.9 ✍️ Editor
✍️ BU Analytics Review

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/value gaps.

Our BU Score puts it at 81Excellent (strong product-market fit). For a Health & Fitness app, that means strong product-market fit.

Track changes month-over-month in the Performance section below — live snapshot history and revenue forecast included.

creator

📊 Performance Tracking LIVE

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Rating
Reviews
Forecast Revenue / mo
Snapshots tracked
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since first record
Range:

💰 Forecast Revenue / mo

MODEL
Revenue 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 (1y old)METRIC
+$200
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)

📈 Reviews Growth

LIVE
Cumulative review count from first BU snapshot. Each point = a tracked update.
💚Sentiment Over Time↑ green = positive · ↓ red = negative
Apr 25
May 25
Jun 25
Jul 25
Aug 25
Sep 25
Oct 25
Nov 25
Dec 25
Jan 26
Feb 26
Mar 26

⭐ Rating Trend

LIVE
Average rating evolution. Updates with each new review batch.

🗓️ Snapshot Timeline

HISTORY
Each bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →
💾 154 MB🔞 17+📱 iOS 15.5+🔖 v1.26.0🔄 updated 2d ago🌐 EN📂 Health & Fitness💰 Paid🚀 Launched 2024 (1y old)

📝 About this app

100 Healthy Years

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.

160+ LAB TESTS
Membership includes testing for your heart, hormones, thyroid, liver, kidneys, toxins, nutrients, inflammation, autoimmunity, immunity and more.

ADVANCED MRI & CT SCANS
Detect early signs of cancer and hundreds of other potential conditions with the option to purchase advanced imaging for your brain, pancreas, liver, spine, ovaries, prostate, heart and much more.

PRIVATE AI CHAT
Ask questions about your results, identify meaningful patterns, and figure out where to focus next, with Private AI Chat—built in partnership with top clinicians.

CONNECT WEARABLES
Connect Apple Health and other health devices and wearables to see how your activity, sleep, and daily habits affect your lab test results and long-term health.

PROTOCOLS
Translate your lab results, scans and health history into clear, evidence-based plans for nutrition, activity, and supplements—all customizable to your goals and preferences.

UPLOAD HEALTH RECORDS
Upload past lab test results, scans, and other medical records for a more complete view of your health, all in one secure place.

PROGRESS YOU CAN SEE
Twice-yearly and On-Demand testing helps you track your results over time, monitor for early signs of disease, and identify where to focus next.

ADVANCED LAB TESTS
Membership includes 160+ lab tests, plus the option to purchase advanced On-Demand tests for:

- Detection of 50+ cancers
- Alzheimer’s risk detection
- MTHFR gene variants
- Advanced MRI and CT scans starting at $365
- Food allergies and sensitivities
- …and much more

ACCESSIBILITY
What could cost as much as $15,000 on your own is included with membership for just $365/year. Lab testing is available at over 2,000 lab locations across the US, with no insurance needed.

SECURITY
Function was built for privacy and security. Function is built to HIPAA standards. Your information is secure.

How it works:
1. Join Function and schedule your first set of lab tests.
2. Get your results and personalized Protocols. Ask questions with your Private AI Chat.
3. See your progress with 60+ lab tests at your Mid-Year Test.
4. Purchase MRI or CT scans and other advanced On-Demand Tests any time.

DISCLAIMER
Function Health is a technology company and not a laboratory or medical provider. All laboratory and medical services are provided by independent third parties. Function Health does not offer medical advice, laboratory services, a diagnosis, medical treatment, or any form of a medical opinion; its services are not a substitute for medical care, medical advice, and/or a detailed discussion with a physician or other licensed provider. If you have any questions regarding any laboratory results or any other information that you access through Function Health, you should contact a physician or other licensed provider. All material, information, data, and content that Function Health provides is strictly for general information purposes. For additional important information: https:// www.functionhealth.com/terms-of-service.

🆕 What's New · v1.26.0

This update includes:
• 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
functionhealth.com
Tagline
Check your health.
Description
It’s time you own your health. Function includes 160+ lab tests and personalized protocols for instant action. Tracked over time in one secure place.
Founded
Not found
HQ / Address
Not found
Employees
Not found
Logo
OG image

Revenue

Verified revenue / mo
Not found
AI revenue estimate / mo
Not found
AI annual estimate
Not found
ML model estimate / mo
$17.9K/mo
Top-grossing rank
Outside top 100 in US Health & Fitness
All-time revenue
Not found
Pricing
Not found

Founder

Name
Not found
X / Twitter
https://x.com/function
LinkedIn
https://www.linkedin.com/company/functionhealth/
GitHub
Not found
X followers
Not found
Public statements
Not found

Funding

Total raised
Not found
Last round
Not found
Investors
Not found
Crunchbase
Not found
AngelList
Not found

Press & Links

Articles found
Not found
Listed on
Not found
Blog
https://functionhealth.com/newsroom
Press / News
Not found

Contacts & Socials

Socials
facebook · instagram · linkedin · tiktok · twitter · youtube
Email
Not found
Phone
Not found
Contact page
https://functionhealth.com/contact-us
About page
https://functionhealth.com/about
📈Ratings growth20,240 ratings+686% lifetimeShow 3-year history estimate ▾Sep 2024Jan 2026May 2026
Tracked (44 weeks) Pre-tracking estimate (21 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.
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