Comparison

Function Health vs Nutri AI Gut

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Function Health

Gain deep insights into your health with over 160 lab tests annually, personalized protocols, and AI-powered chat. Understand your body's evolution, track progress, and make informed changes with advanced science and your data.

Highlights
  • 160+ annual lab tests
  • Personalized health protocols
  • AI-powered private chat
  • Home or office blood draws
  • Advanced MRI & CT scans
  • Connect wearables
  • 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 powered by Medical Intelligence—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. MEDICAL INTELLIGENCE Built with leading medical scientists, Function’s proprietary model brings together your health history and insights from a large population to help you better understand your health and find steps you can take today to support your health over time. PRIVATE AI CHAT Ask questions about your results, identify meaningful patterns, and figure out where to focus next, with Private AI Chat—powered by Medical Intelligence and 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

Nutri AI Gut

Effortlessly track your nutrition by snapping photos of meals or scanning barcodes. Receive personalized AI coaching and insights to understand your food's impact on your health and make better choices.

Highlights
  • Photo meal scanning
  • AI personalized coaching
  • Barcode scanning
  • Daily calorie and macro tracking
  • Symptom tracking
  • Weekly progress summaries
Features
Read full description

Some meals leave you feeling fine. Others leave you bloated, tired or uncomfortable — and three days later it is almost impossible to remember which meal was which. Nutri AI keeps your meals and your symptoms in one place, so possible patterns have a chance to show up. HOW IT WORKS 1. Snap a photo of your meal. Nutri AI estimates what is in it in seconds. 2. Log how you felt afterwards — bloating, energy, digestion, or a note in your own words. 3. Over time, Patterns surfaces possible links between what you ate and how you felt. WHAT YOU GET • A photo food diary that takes seconds per meal • Symptom logging attached to every entry, not a separate app • Estimated calories, protein, carbs and fat • A simple letter grade for each meal • Patterns that surface possible food and symptom links worth observing • A coach you can ask questions about your own log WHO IT IS FOR People who suspect something they eat is not agreeing with them — bloating, low energy, or unpredictable digestion — and who want a record worth bringing to a professional rather than a guess. WORTH KNOWING Nutri AI is not a medical device and does not diagnose anything. Nutrition values are estimates from a photo, not measurements. Patterns are observations from your own log, not clinical findings. If a symptom concerns you, talk to a qualified healthcare professional.

Screenshots

Function Health4 screens
Nutri AI Gut4 screens

Verdict

The call

The clearest difference is review sentiment: Nutri AI Gut at 100% against Function Health's 62%. Nutri AI Gut also leads on device support (3 vs 1). Function Health's advantage is in-app purchases (none vs 2) and ratings volume (25K vs 9). On price, update cadence, ads 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. Nutri AI Gut sells 2 in-app purchases, starting at $9.99 per month. 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 4.6. That said, the two scores are not equally well evidenced: Function Health has 25K ratings behind it against 9, so its average is the more settled of the two. Written reviews complicate that: 62% of Function Health's written reviews are positive against 100% of Nutri AI Gut's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Function Health ships an update weekly, Nutri AI Gut every 5 days. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

Scorecard6 real differences · 4 level
Function Health versus Nutri AI Gut: the parameters behind the verdict, then further details
ParameterFunction HealthNutri AI Gut
PriceFreeFree
Rating4.9 (25K ratings) — better4.6 (9 ratings)
Positive reviews61.5% of reviews100.0% of reviews — better
Number of ratings25K — better9
Update frequencyWeeklyEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.415.1 — better
Further details — not scored
Size206 MB56 MB
Age rating17+4+
DeveloperFunction HealthMatheus Mello

Customer experience

Function Health

All ratings25,127 ratings
Positive99.0%
Neutral0.4%
Negative0.6%
Written reviews351 reviews
Positive61.5%
Neutral5.7%
Negative32.8%

Nutri AI Gut

All ratings9 ratings
Positive88.9%
Neutral11.1%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

Nutri AI Gut

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Function Health

No in-app purchases

2 purchases

Nutri AI Gut

Subscriptions2
  • Premium Monthly7 Days trial$9.991 Month
  • Premium Annual7 Days trial$39.991 Year

Questions

Is Function Health free?
Function Health is free to download, with no in-app purchases.
Is Nutri AI Gut free?
Nutri AI Gut is free to download, with in-app purchases available.
Which has better reviews, Function Health or Nutri AI Gut?
Function Health is rated higher. Function Health averages 4.9 out of 5 from 25K ratings, while Nutri AI Gut averages 4.6 from 9 ratings.
Do Function Health or Nutri AI Gut have ads?
Neither Function Health nor Nutri AI Gut shows ads.
Which is updated more often, Function Health or Nutri AI Gut?
Function Health ships an update weekly, and Nutri AI Gut every 5 days. Most recently, Function Health was updated on November 7, 2026 and Nutri AI Gut on November 5, 2026.

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