Comparison

InsideTracker 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

InsideTracker

This app analyzes your blood, DNA, and fitness tracker data to provide personalized, science-backed recommendations for improving your health and well-being. It offers a guided program with actionable insights on nutrition, supplements, and exercise to help you feel stronger and live longer.

Highlights
  • Blood, DNA, and fitness tracker data analysis
  • Personalized Action Plan
  • Nutrition and supplement recommendations
  • Exercise and habit guidance
  • InnerAge analysis
  • AI-powered health guide
Features
Read full description

Want to quickly unlock your strongest, healthiest body and mind? When you join InsideTracker, you enter a guided program that turns your blood, DNA, and fitness tracker data into simple, science-backed recommendations. It’s effective, but not complicated. Think high-impact rather than high effort. After one blood test: • 80% of people improve at least one at-risk biomarker • 60% of people reduce their InnerAge • 75% improve at least one Healthspan Category Score (such as fitness, sleep, or hormone health) Download the app to start your membership. TRACK EVERYTHING Your data unlocks your recommendations—which is why InsideTracker goes so deep. You’ll track your blood, DNA, nutrition, and fitness tracker data in one place. You’ll also self-report information such as dietary preferences, supplement intake, and workout habits. For blood and DNA testing, you can purchase tests through us, or you can upload data you already have from another provider. FOLLOW YOUR PERSONALIZED ACTION PLAN As a member, you’ll receive a personalized Action Plan complete with foods, supplements, exercises, and other healthy habits. All of your recommendations will be based on a curated body of research that includes thousands of clinical studies. VALIDATE YOUR HEALTHY CHOICES With repeat blood testing, you’ll quickly see the impact of each recommendation. You’ll learn exactly what works and what doesn’t, and over time, you’ll develop a sixth sense about how your body responds to different foods, supplements, and training routines. BUILD YOUR MOTIVATION Most health plans fail as soon as people start feeling lost. InsideTracker won’t let that happen. We’ll keep you on track with ongoing support. Along with your Action Plan, you’ll get: • Weekly Healthspan Habit Reports Keep your routine dialed in with one personalized habit to focus on every 7 days. • Daily ProTips Access spontaneous moments of health with real-time recommendations based on your sleep, workouts, and other activities. • InnerAge Slow or reverse your aging with an analysis of your body’s true age—plus recommendations to drive it lower. • Terra Become an expert in your body by talking to a personalized AI guide that has access to your health data. • Healthspan Category Scores Focus on what matters most with blood tests and analysis for 10 key health areas, including fitness, sleep, inflammation, and hormone health. • Nutrition DeepDive Improve your sleep, workout recovery, and overall energy with your personalized nutrition and meal-timing report. ABOUT INSIDETRACKER InsideTracker was founded in Cambridge, Mass., in 2009 by experts in aging, genetics, and biology. Today, it's the industry leader in personalized health. Using blood, DNA, fitness, and nutrition data, it provides personalized recommendations for living longer, looking younger, and achieving peak performance. Whether you're an athlete, professional, or parent, InsideTracker can deliver peak health in a way that fits seamlessly into your life. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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

InsideTracker4 screens
Function Health4 screens

Verdict

The call

The clearest difference is rating: Function Health at 4.9 against InsideTracker's 3.4. Function Health also leads on in-app purchases (none vs 2) and review sentiment (62% vs 33%). On price, ads, device support 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. InsideTracker sells 2 in-app purchases, starting at $149.00 per year. 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 3.4. That said, the two scores are not equally well evidenced: Function Health has 25K ratings behind it against 341, so its average is the more settled of the two. Written reviews point the same way: 33% of InsideTracker's written reviews are positive against 62% of Function Health's.

UpkeepUpdate frequency

InsideTracker ships an update fortnightly, Function Health weekly. The most recent releases landed on September 23, 2026 and September 29, 2026 respectively.

Scorecard6 real differences · 4 level
InsideTracker versus Function Health: the parameters behind the verdict, then further details
ParameterInsideTrackerFunction Health
PriceFreeFree
Rating3.4 (341 ratings)4.9 (25K ratings) — better
Positive reviews33.3% of reviews61.9% of reviews — better
Number of ratings34125K — better
Update frequencyFortnightlyWeekly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhoneiPhone
Requires iOS17.016.4 — better
Further details — not scored
Size112 MB201 MB
Age rating17+17+
DeveloperSegterra IncFunction Health

Customer experience

InsideTracker

All ratings341 ratings
Positive55.1%
Neutral7.6%
Negative37.2%
Written reviews129 reviews
Positive33.3%
Neutral11.6%
Negative55.0%

Function Health

All ratings24,731 ratings
Positive99.0%
Neutral0.4%
Negative0.6%
Written reviews341 reviews
Positive61.9%
Neutral5.6%
Negative32.6%

User reviews

InsideTracker

From 341 App Store ratings

What we love

  • ⭐ Simple unprompted insights
  • ⭐ Great app for health tracking
  • ⭐ The health data I didn't know was available to me
  • ⭐ The best biomarker analysis service
  • ⭐ Love this App

Room to improve

  • 🐛 Not bad but doesn't import nutrition from Apple Health (or anywhere at all)
  • 🐛 App Doesn't Work
  • 🐛 Scam
  • 🐛 Could be a lot better
  • 🐛 Works fairly well, except nutrition deep dive

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

Bugs and requests

InsideTracker

Reported bugs

5 issues
  • Syncing with Apple Health not working properly
  • Inability to check in or check off daily recommendations
  • Constant need to re-login
  • Notifications not working as expected
  • Garmin integration not working

Requested features

2 requests
  • Ability to import nutrition data from Apple Health
  • Ability to manually enter sleep data

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

2 purchases

InsideTracker

Subscriptions1
  • InsideTracker membership$149.001 Year
One-time1
  • InnerAge 2.0$89.99
None

Function Health

No in-app purchases

Questions

Is InsideTracker free?
InsideTracker 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, InsideTracker or Function Health?
Function Health is rated higher. InsideTracker averages 3.4 out of 5 from 341 ratings, while Function Health averages 4.9 from 25K ratings.
Do InsideTracker or Function Health have ads?
Neither InsideTracker nor Function Health shows ads.
Which is updated more often, InsideTracker or Function Health?
InsideTracker ships an update fortnightly, and Function Health weekly. Most recently, InsideTracker was updated on September 23, 2026 and Function Health on September 29, 2026.

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