Comparison

Molekule 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

Molekule

This app connects to advanced air purifiers and humidifiers, offering real-time air quality monitoring and control. It allows users to track filter status, schedule operation, and utilize features like dark mode for a healthier home environment.

Highlights
  • PECO technology air purification
  • Real-time air quality sensing
  • Filter status tracking
  • Dark mode scheduler
  • Reliable cloud connection
  • Control multiple devices
Features
Read full description

Introducing Air Score 2.0 and support for PECOAir and PECOAir+. See what's in your air and how to improve it. KNOW YOUR AIR SCORE One number for the air in your home, updated as conditions change, with a color band so you know at a glance whether things are good, moderate, or need attention. CONTROL ALL OF YOUR MOLEKULE DEVICES Adjust fan speed, switch modes, and manage all your Molekule devices from anywhere. Connects with new PECOAir and PECOAir+ purifiers, Glow Humidifier, and legacy Air, Air Mini, Air Mini+, and Air Pro purifiers. LOCATION MANAGEMENT Monitor your air quality by room or by property, wherever you are. If you’ve got a Molekule purifier there, you’ve got a reading. KNOW WHAT'S IN YOUR AIR Fast readings from PECOAir's sensor suite: fine particles (PM2.5 and PM10), VOCs, humidity, and temperature. Indoor readings alongside outdoor conditions, so you always have context. TRENDS THAT MEAN SOMETHING Get notified when pollutant levels rise, and see what triggered the spike. Look back by day, week, or month to see what's really shaping your air, from cooking and cleaning to pollen and wildfire smoke. NEVER MISS A FILTER CHANGE See how much life your filter has left and get notified when it's time for a replacement, so your purifier keeps performing at its best. Molekule products are designed for general wellness and improving indoor air quality. They are not medical devices and are not intended to diagnose, treat, cure, or prevent any disease. Questions or feedback? Reach our team at help@molekule.com or visit help.molekule.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

Molekule4 screens
Function Health4 screens

Verdict

The call

The clearest difference is review sentiment: Function Health at 62% against Molekule's 17%. Function Health also leads on rating (4.9 vs 4.4) and update cadence (weekly vs every 2 months). Molekule's advantage is monetization model (free vs subscription). On price, ratings volume, 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

Function Health holds the better App Store score, 4.9 against 4.4. Both are backed by a comparable volume of ratings — 12K and 25K respectively. Written reviews point the same way: 17% of Molekule's written reviews are positive against 62% of Function Health's.

UpkeepUpdate frequency

Molekule ships an update every 2 months, Function Health weekly. Both last shipped on October 23, 2026.

Scorecard5 real differences · 6 level
Molekule versus Function Health: the parameters behind the verdict, then further details
ParameterMolekuleFunction Health
PriceFreeFree
Rating4.4 (12K ratings)4.9 (25K ratings) — better
Positive reviews17.4% of reviews61.8% of reviews — better
Number of ratings12K25K — better
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterSubscription
Best chart rank—#208 — better
DevicesiPhone, iPod — betteriPhone
Requires iOS15.5 — better16.4
Further details — not scored
Size155 MB203 MB
Age rating4+17+
DeveloperMOLEKULE GROUP, INC.Function Health

Customer experience

Molekule

All ratings11,705 ratings
Positive83.7%
Neutral3.0%
Negative13.2%
Written reviews334 reviews
Positive17.4%
Neutral7.8%
Negative74.9%

Function Health

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

User reviews

Molekule

From 12K App Store ratings

What we love

  • 🚀 Remote operating
  • 🌟 Great air purifier
  • 👍 Sleek design
  • 💨 Helps with allergies

Room to improve

  • 🐛 Buggy app
  • 🔌 Connectivity issues
  • 🕰️ Unreliable filter status
  • 📱 Useless app
  • 🤯 Frustrating setup

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

Molekule

Reported bugs

4 issues
  • App crashes frequently
  • Inability to change app language
  • Devices randomly disconnecting from app
  • Inaccurate filter life reporting

Requested features

3 requests
  • Scheduling options for auto mode
  • Ability to order filters directly from app
  • Improved app stability and reliability

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

Molekule

No in-app purchases

None

Function Health

No in-app purchases

Questions

Is Molekule free?
Molekule 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, Molekule or Function Health?
Function Health is rated higher. Molekule averages 4.4 out of 5 from 12K ratings, while Function Health averages 4.9 from 25K ratings.
Do Molekule or Function Health have ads?
Neither Molekule nor Function Health shows ads.
Which is updated more often, Molekule or Function Health?
Molekule ships an update every 2 months, and Function Health weekly. Most recently, Molekule was updated on October 23, 2026 and Function Health on October 23, 2026.

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