Comparison

The U vs Function Health

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

Head to head
About

The U

Receive personalized workout plans from specialists based on your health history and goals. Engage in interactive live-streamed classes with real-time feedback from trainers, or access a library of on-demand content. Programs are also available for specific medical conditions.

Highlights
  • Customized workout prescriptions
  • Live interactive at-home classes
  • On-demand workout library
  • Doctor-endorsed programs for medical conditions
  • Nutrition and meditation guidance
  • Real-time trainer feedback
Features
Read full description

CUSTOMIZED PRESCRIPTION w/ PRESCRIPTFIT® Start with a complimentary consult with one of The U’s specialists, who will use your health history and goals to provide a recommended weekly prescription of strength, cardio and recovery workouts. Terms of Use - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ EYES-ON-YOU AT-HOME WORKOUTS Get feedback and modifications tailored to YOUR body with The U’s team of LIVE trainers who see you, motivate you and hold you accountable. With 2 coaches on every class, our revolutionary, at-home, interactive workouts provide the sense of community you’ve come to expect from an in-person class, all while ensuring you’re moving safely and effectively. CONVENIENT, PRACTICAL ON DEMAND CONTENT Adhere to your customized Prescription with The U’s On Demand library, featuring strength, cardio and recovery workouts in various time formats to fit in your schedule. Filter to find what you need and save your favorites for future access. DOCTOR-ENDORSED PROGRAMS FOR MEDICAL CONDITONS Take out the guesswork of what types of movement are safe and suitable for your diagnosis with our PrescriptFit® pre-built programs for medical conditions. Designed and approved by our Advisory Board, these 6-week programs allow you to build up confidence in body and mind through trusted, strategic progressions. LIFESTYLE CONTENT AND RECOMMENDATIONS Compliment your workouts with tips and guidance on nutrition, meditation and breath work with quick, educational videos from The U’s health coaches. NO MEMBERSHIP REQUIRED, EVER. ALL LEVEL WELCOME AND ENCOURAGED, ALWAYS. QUESTIONS? Contact us directly at info@morethanjustagym.com.

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.

Screenshots

The U4 screens
Function Health4 screens

Verdict

The call

The U and Function Health both sit at 5.0 stars, but that hides the real split: 100% of The U's written reviews are positive against 62% of Function Health's. The U also leads on device support (3 vs 1). Function Health's advantage is in-app purchases (none vs 3) and update cadence (weekly vs every 2 months). On price, rating, ads and iOS requirement 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. The U sells 3 in-app purchases, starting at $39.99 per month. Function Health asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for The U against 4.9 for Function Health. That said, the two scores are not equally well evidenced: Function Health has 25K ratings behind it against 12, so its average is the more settled of the two. Written reviews are what separate them: 100% of The U's written reviews are positive against 62% of Function Health's.

UpkeepUpdate frequency

The U ships an update every 2 months, Function Health weekly. The most recent releases landed on October 11, 2026 and October 19, 2026 respectively.

Scorecard7 real differences · 4 level
The U versus Function Health: the parameters behind the verdict, then further details
ParameterThe UFunction Health
PriceFreeFree
Rating5.0 (12 ratings) — better4.9 (25K ratings)
Positive reviews100.0% of reviews — better61.8% of reviews
Number of ratings1225K — better
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterSubscription
Best chart rank—#173 — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better16.4
Further details — not scored
Size52 MB203 MB
Age rating12+17+
DeveloperThe Digital U, LLCFunction Health

Customer experience

The U

All ratings12 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Function Health

All ratings24,942 ratings
Positive99.0%
Neutral0.4%
Negative0.6%
Written reviews348 reviews
Positive61.8%
Neutral5.5%
Negative32.8%

Bugs and requests

The U

Not enough reviews yet to summarise bugs or 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

In-app purchases

3 purchases

The U

Subscriptions3
  • 30 Days On-Demand1 Month trial$39.991 Month
  • 30 Days On-Demand (Premium)1 Month trial$74.991 Month
  • Live Classes$150.001 Month
None

Function Health

No in-app purchases

Questions

Is The U free?
The U is free to download, with in-app purchases available.
Is Function Health free?
Function Health is free to download, with no in-app purchases.
Which has better reviews, The U or Function Health?
The U is rated higher. The U averages 5.0 out of 5 from 12 ratings, while Function Health averages 4.9 from 25K ratings.
Do The U or Function Health have ads?
Neither The U nor Function Health shows ads.
Which is updated more often, The U or Function Health?
The U ships an update every 2 months, and Function Health weekly. Most recently, The U was updated on October 11, 2026 and Function Health on October 19, 2026.

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