Comparison

Function Health vs Prove It

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

Prove It

Empower your supplement choices with science-backed reviews. Instantly scan barcodes or search our database to understand ingredient efficacy, safety, and research quality. Make informed decisions about your health investments.

Highlights
  • Evidence-based analysis
  • Barcode scanning
  • Extensive supplement database
  • Ingredient efficacy and safety
  • Research quality assessment
  • Informed decision making
Features
Read full description

Take control of your supplement choices with comprehensive, science-based reviews in seconds. Whether you're at the store or researching at home, our app helps you: - Access evidence-based analysis of supplement efficacy and safety - Instantly scan product barcodes to get detailed reviews - Search our extensive database of supplements - Understand the science behind ingredient claims - Make informed decisions about your health investments Every review is grounded in scientific research, helping you understand: - What the research actually says about effectiveness - Known safety considerations and interactions - Recommended dosages based on clinical studies - Quality of available evidence Stop wondering about supplement claims and start making evidence-based decisions for your health. MEDICAL DISCLAIMER: This app is for educational and informational purposes only. It is not intended to provide medical advice, diagnosis, or treatment recommendations. The information provided should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified healthcare provider with any questions you may have regarding supplements, a medical condition, or treatment, and never disregard professional medical advice or delay in seeking it because of something you have read in this app. Decisions about supplement use should be made in consultation with your healthcare providers, taking into account your individual health circumstances. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Function Health4 screens
Prove It4 screens

Verdict

The call

The clearest difference is review sentiment: Function Health at 62% against Prove It's 9%. Function Health also leads on rating (4.9 vs 4.4) and in-app purchases (none vs 25). Prove It's advantage is device support (3 vs 1). On price, ratings volume, update cadence 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. Prove It sells 25 in-app purchases, starting at $4.99 per 7 days. Function Health asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Function Health holds the better App Store score, 4.9 against 4.4. Both are backed by a comparable volume of ratings — 25K and 16K respectively. Written reviews point the same way: 62% of Function Health's written reviews are positive against 9% of Prove It's.

UpkeepUpdate frequency

Function Health ships an update weekly, Prove It every 6 days. The most recent releases landed on September 25, 2026 and September 24, 2026 respectively.

Scorecard6 real differences · 4 level
Function Health versus Prove It: the parameters behind the verdict, then further details
ParameterFunction HealthProve It
PriceFreeFree
Rating4.9 (25K ratings) — better4.4 (16K ratings)
Positive reviews61.9% of reviews — better9.2% of reviews
Number of ratings25K — better16K
Update frequencyWeeklyEvery 6 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.415.1 — better
Further details — not scored
Size201 MB132 MB
Age rating17+4+
DeveloperFunction HealthControl. Alt. Delete. LLC

Customer experience

Function Health

All ratings24,683 ratings
Positive99.0%
Neutral0.4%
Negative0.6%
Written reviews341 reviews
Positive61.9%
Neutral5.6%
Negative32.6%

Prove It

All ratings15,639 ratings
Positive85.5%
Neutral6.7%
Negative7.8%
Written reviews707 reviews
Positive9.2%
Neutral3.4%
Negative87.4%

User reviews

Function Health

From 25K App Store ratings

What we love

  • 🚀 Seamless process for blood tests and results
  • 📊 Comprehensive health insights and tracking
  • 🧠 Helpful clinician notes and recommendations
  • 👍 User-friendly and visually appealing app
  • 💰 Affordable compared to other options

Room to improve

  • 🔍 Lack of communication and support responsiveness
  • 🐛 Some bugs and usability issues in the app

Prove It

From 16K App Store ratings

What we love

  • 🚀 Highly informative
  • 👍 Useful information
  • 👍 Simple and straightforward
  • 👍 Convenient and helpful
  • 👍 Personalized recommendations

Room to improve

  • 🐛 Incomplete database
  • 🐛 Scanning issues

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

Prove It

Reported bugs

2 issues
  • Scanning errors
  • Incompatibility with some supplements

Requested features

2 requests
  • Ability to manually add supplements
  • Reduce subscription cost

In-app purchases

None

Function Health

No in-app purchases

25 purchases

Prove It

Subscriptions25
  • Weekly Subscription with Trial3 Days trial$4.997 Days
  • Weekly Subscription$4.997 Days
  • weekly$7.997 Days
Show 22 more
  • monthly subscription$9.991 Month
  • Yearly Subscription$14.991 Year
  • yearly subscription$19.991 Year
  • Pro Subscription$25.993 Months
  • Food and Skincare Health Plan$29.991 Year
  • Prove It Quarterly$29.993 Months
  • Yearly Subscription$29.991 Year
  • Pro Subscription$32.493 Months
  • Yearly Subscription$34.991 Year
  • Yearly Subscription$35.901 Year
  • Prove It Quarterly$39.993 Months
  • Yearly Subscription$39.991 Year
  • Yearly Subscription$47.901 Year
  • Yearly Subscription with Trial3 Days trial$49.991 Year
  • Yearly 49.99$49.991 Year
  • Prove It Subscription3 Months trial$59.993 Months
  • yearly subscription$59.991 Year
  • yearly subscription$69.991 Year
  • Yearly Subscription$71.901 Year
  • Yearly Subscription$83.901 Year
  • Yearly Subscription$95.901 Year
  • yearly subscription$99.991 Year

Questions

Is Function Health free?
Function Health is free to download, with no in-app purchases.
Is Prove It free?
Prove It is free to download, with in-app purchases available.
Which has better reviews, Function Health or Prove It?
Function Health is rated higher. Function Health averages 4.9 out of 5 from 25K ratings, while Prove It averages 4.4 from 16K ratings.
Do Function Health or Prove It have ads?
Prove It shows ads; Function Health does not.
Which is updated more often, Function Health or Prove It?
Function Health ships an update weekly, and Prove It every 6 days. Most recently, Function Health was updated on September 25, 2026 and Prove It on September 24, 2026.

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