Comparison

Function Health vs Xtend Health

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Function Health

Take control of your health with comprehensive lab testing, personalized protocols, and AI-powered insights. Understand your body's data, track changes over time, and make informed decisions for long-term wellness. Connect wearables and upload records for a complete health picture.

Highlights
  • 160+ lab tests annually
  • Personalized health protocols
  • Private AI Chat for results
  • Connect health wearables
  • Advanced MRI & CT scans
  • Upload health records
Features
Read full description

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 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.

About

Xtend Health

This app acts as a personal wellness companion, helping you manage your health by tracking daily tasks, biometrics, and lifestyle trends. It integrates with popular wearables and allows you to schedule wellness check-ins and consultations.

Highlights
  • Care plan management
  • Daily task tracking
  • Biometric and lab review
  • Wearable device integration
  • Lifestyle trend analysis
  • Wellness appointment scheduling
  • Personalized health insights
Features
Read full description

Xtend Health is your personal wellness companion designed to help you stay connected, organized, and in control of your overall wellbeing — all from one app. See your care plan, follow daily tasks, track biometrics, review labs, and manage connected devices in one app. Easily sync data from your favorite wearables (Apple Health, Oura, Whoop) to view all your wellness metrics in one place. Track your daily activity, sleep, energy, and lifestyle trends through simple, visual dashboards. Plan your week better by scheduling wellness check-ins, lab visits, or consultations directly through the app. Stay motivated with personalized insights that help you make small, meaningful changes toward a healthier lifestyle. Medical Disclaimer: Xtend Health is a technology platform, not a laboratory or medical provider. All laboratory, diagnostic, and clinical services accessed through the app are provided by independent third parties. Xtend Health does not offer medical advice, laboratory services, a diagnosis, medical treatment, or any form of medical opinion. Its services are not a substitute for medical care, medical advice, or consultation with a physician or other licensed healthcare provider. If you have questions about any laboratory results, data, or information accessed through Xtend Health, please contact a qualified physician or licensed healthcare professional. All materials, data, and insights provided by Xtend Health — including those generated using OpenAI’s GPT-based AI model — are intended solely for general wellness and informational purposes and may not always include direct citations. For more information, please refer to our Terms of Service: https://www.xtendhealth.com/termsofservice

Screenshots

Function Health4 screens
Xtend Health1 screens

Verdict

The call

Function Health and Xtend Health both sit at 4.9 stars, but that hides the real split: 100% of Xtend Health's written reviews are positive against 62% of Function Health's. Xtend Health also leads on monetization model (free vs subscription). Function Health's advantage is ratings volume (25K vs 6). On price, rating, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Function Health against 5.0 for Xtend Health. That said, the two scores are not equally well evidenced: Function Health has 25K ratings behind it against 6, so its average is the more settled of the two. Written reviews are what separate them: 62% of Function Health's written reviews are positive against 100% of Xtend Health's.

UpkeepUpdate frequency

Function Health ships an update weekly, Xtend Health every 2 weeks. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

Scorecard3 real differences · 7 level
Function Health versus Xtend Health: the parameters behind the verdict, then further details
ParameterFunction HealthXtend Health
PriceFreeFree
Rating4.9 (25K ratings)5.0 (6 ratings) — better
Positive reviews61.8% of reviews100.0% of reviews — better
Number of ratings25K — better6
Update frequencyWeekly — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationSubscriptionFree — better
DevicesiPhoneiPhone
Requires iOS16.416.0 — better
Further details — not scored
Size203 MB70 MB
Age rating17+17+
DeveloperFunction HealthXtend Health

Customer experience

Function Health

All ratings25,022 ratings
Positive99.0%
Neutral0.4%
Negative0.6%
Written reviews348 reviews
Positive61.8%
Neutral5.5%
Negative32.8%

Xtend Health

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Function Health

Reported bugs

2 issues
  • App sometimes redirects back to the home screen when trying to view results
  • Occasional typos and formatting issues in the app

Requested features

3 requests
  • More customization options in the app settings
  • Ability to print or export test results and recommendations
  • Specific supplement recommendations rather than broad suggestions

Xtend Health

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Function Health

No in-app purchases

None

Xtend Health

No in-app purchases

Questions

Is Function Health free?
Function Health is free to download, with no in-app purchases.
Is Xtend Health free?
Xtend Health is free to download, with no in-app purchases.
Which has better reviews, Function Health or Xtend Health?
Xtend Health is rated higher. Function Health averages 4.9 out of 5 from 25K ratings, while Xtend Health averages 5.0 from 6 ratings.
Do Function Health or Xtend Health have ads?
Neither Function Health nor Xtend Health shows ads.
Which is updated more often, Function Health or Xtend Health?
Function Health ships an update weekly, and Xtend Health every 2 weeks. Most recently, Function Health was updated on October 24, 2026 and Xtend Health on October 23, 2026.

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