Comparison

Function Health vs Don't Die

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

Don't Die

This app fosters a supportive community for sharing health journeys and achievements. It helps users improve their longevity score through habit mastery, local event connections, and friendly competition. Integrate wearables for automatic score calculation and progress tracking.

Highlights
  • Share health achievements with community
  • Connect with local communities and events
  • Improve health habits and Don't Die Score
  • Compete with friends and family on scores
  • Measure progress with wearable integration
Features
Read full description

- SHARE: Share your health, achievements, knowledge, workouts, and more with a friendly and encouraging community. - EXPLORE: Connect with local Don’t Die communities and events near you. - LEVEL UP: Master health habits by constantly improving your Don’t Die Score. - COMPETE: See how your Don’t Die Score compares with your friends, family, and Bryan Johnson. - MEASURE: Connect your wearable to automatically calculate your daily Don’t Die Score, and track your progress over time towards longevity best practices.

Screenshots

Function Health4 screens
Don't Die4 screens

Verdict

The call

The clearest difference is monetization model: Don't Die at ad-supported against Function Health's subscription. Function Health's advantage is ratings volume (25K vs 641). On price, rating, review sentiment and update cadence 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 4.8 for Don't Die. That said, the two scores are not equally well evidenced: Function Health has 25K ratings behind it against 641, 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 68% of Don't Die's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

Scorecard2 real differences · 8 level
Function Health versus Don't Die: the parameters behind the verdict, then further details
ParameterFunction HealthDon't Die
PriceFreeFree
Rating4.9 (25K ratings) — better4.8 (641 ratings)
Positive reviews61.9% of reviews68.4% of reviews — better
Number of ratings25K — better641
Update frequencyWeeklyWeekly
AdsNoNo
In-app purchasesNoNo
MonetizationSubscriptionAd-supported — better
DevicesiPhoneiPhone, iPad — better
Requires iOS16.416.0 — better
Further details — not scored
Size199 MB53 MB
Age rating17+17+
DeveloperFunction HealthBlueprint Bryan Johnson

Customer experience

Function Health

All ratings24,661 ratings
Positive99.0%
Neutral0.4%
Negative0.6%
Written reviews341 reviews
Positive61.9%
Neutral5.6%
Negative32.6%

Don't Die

All ratings641 ratings
Positive96.1%
Neutral1.9%
Negative2.0%
Written reviews98 reviews
Positive68.4%
Neutral4.1%
Negative27.6%

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

Don't Die

From 641 App Store ratings

What we love

  • 👍 Amazing community
  • 🚀 Great app interface
  • 💡 Interesting concept and mission
  • 👍 Engaging social experience
  • 👍 Seamless integration with health tracking

Room to improve

  • 🐛 Technical issues (glitches, freezing, crashes)
  • 🐛 Poor UX for certain features (e.g., replying to comments)
  • 🔒 Privacy concerns around data sharing
  • 🔧 Needs more polish and refinement

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

Don't Die

Reported bugs

3 issues
  • Difficulty verifying phone number
  • Issues with updating fitness levels and leaderboard
  • Compatibility problems on smaller devices

Requested features

3 requests
  • Option to use the app without linking personal data
  • Improved stability and performance
  • Enhanced leaderboard and fitness tracking features

In-app purchases

None

Function Health

No in-app purchases

None

Don't Die

No in-app purchases

Questions

Is Function Health free?
Function Health is free to download, with no in-app purchases.
Is Don't Die free?
Don't Die is free to download, with no in-app purchases.
Which has better reviews, Function Health or Don't Die?
Function Health is rated higher. Function Health averages 4.9 out of 5 from 25K ratings, while Don't Die averages 4.8 from 641 ratings.
Do Function Health or Don't Die have ads?
Neither Function Health nor Don't Die shows ads.
Which is updated more often, Function Health or Don't Die?
Function Health ships an update weekly, and Don't Die weekly. Most recently, Function Health was updated on September 24, 2026 and Don't Die on September 22, 2026.

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