Comparison

FiRE 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

FiRE

This app provides personalized corrective exercises based on a physical assessment. It offers daily educational content and custom workouts designed to be challenging yet safe, with adjustable exercise difficulty.

Highlights
  • Personalized physical assessment
  • Tailored corrective exercises
  • Daily educational content
  • Customizable workout duration
  • Adjustable exercise difficulty
  • Gradual intensity increase
Features
Read full description

Welcome to the FIRST and ONLY Exercise app that combines Education, Assessment, and Great Workouts! I'm Dr. Steve Horney PT, DPT, CSCS an NYU Exercise Science Professor in the world renowned Physical Therapy Department. Thanks for checking out my FiRE App :) The FiRE app will take you through a Physical Assessment and then tailor Corrective Exercises to you that are built right into your Workout. Each time you open the app you will get 60 seconds of Education directly from me, and then we will ask you how much time you want to spend with us. That's it - we will do the rest! We strive for a "Goldilocks" Workout where it's not too easy and not too hard - just right. You have control over every exercise where you can pick either a harder or easier version and if you just let it ride we will slowly and gradually increase the intensity I really hope you enjoy the app, it's my life's work. I see every single comment so if there is something you think it needs or you would prefer, just let me know after the workouts. Enjoy your training that's as High Reward and Low Risk as I could make FiRE: Functional Integrated Resistance Exercise.

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

FiRE4 screens
Function Health4 screens

Verdict

The call

The clearest difference is monetization model: FiRE at free against Function Health's subscription. Function Health's advantage is update cadence (weekly vs every 2 months) and ratings volume (25K vs 2). On price, rating, ads and in-app purchases 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 — 5.0 for FiRE against 4.9 for Function Health. That said, the two scores are not equally well evidenced: Function Health has 25K ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

FiRE ships an update every 2 months, Function Health weekly. The most recent releases landed on October 25, 2026 and October 26, 2026 respectively.

Scorecard3 real differences · 7 level
FiRE versus Function Health: the parameters behind the verdict, then further details
ParameterFiREFunction Health
PriceFreeFree
Rating5.0 (2 ratings) — better4.9 (25K ratings)
Positive reviews—61.8% of reviews
Number of ratings225K — better
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterSubscription
DevicesiPhone, iPod — betteriPhone
Requires iOS15.1 — better16.4
Further details — not scored
Size43 MB203 MB
Age rating4+17+
DeveloperINTEGRATED HEALTH SCIENCES ONLINE LLCFunction Health

Customer experience

FiRE

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Function Health

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

Bugs and requests

FiRE

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

None

FiRE

No in-app purchases

None

Function Health

No in-app purchases

Questions

Is FiRE free?
FiRE is free to download, with no in-app purchases.
Is Function Health free?
Function Health is free to download, with no in-app purchases.
Which has better reviews, FiRE or Function Health?
FiRE is rated higher. FiRE averages 5.0 out of 5 from 2 ratings, while Function Health averages 4.9 from 25K ratings.
Do FiRE or Function Health have ads?
Neither FiRE nor Function Health shows ads.
Which is updated more often, FiRE or Function Health?
FiRE ships an update every 2 months, and Function Health weekly. Most recently, FiRE was updated on October 25, 2026 and Function Health on October 26, 2026.

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